The Usenet Oracle has pondered your question deeply.
Your question was:

> Oh great Oracle whos keyboard never has crumbs,
> Will the USA ever go metric?

And in response, thus spake the Usenet Oracle:

}  Ladies and gentlemen, we are here today to determine the United States
}  measurement challenge once and for all.
}  
}  In the blue corner we have our current US champion for many years,
}  weighing in at 220.4623 pounds, our hero: Igor Imperial.
}  
}  In the red corner we have, weighing in at 100kg all the way from
}  France, and currently storming the world wherever he goes, our
}  challenger: Mean Mr Metric.
}  
}  It will be a great fight today and one that may change the course of
}  history. Can Mean Mr Metric defeat Igor Imperial and change US life
}  forever, or will Igor outwit the classy opponent and maintain his place
}  in history.
}  
}  We are about to find out.
}  
}  Gentlemen, I want a clean fight. Shake hands and come out fighting on
}  the bell.
}  
}  Round 1: "DONG"
}  
}  They both approach each other and meet in the middle of the ring.
}  Metric has trained well and opens with the first punch:
}  
}     How many feet in a mile?
}  
}  Imperial answers after a moments hesitation with:
}  
}     5280
}  
}  "Good exchange there Bob, hasn't worried either of them."
}  
}  "No Bill, it's still neck and neck, although Imperial took a fraction
}  of a second to divert that question."
}  
}  Imperial decides to attack with a similar strategy:
}  
}     How many metres in a kilometre?
}  
}  Instantly, Metric flashes back with:
}  
}     1000
}  
}  "Wasn't that a great counter by Metric eh Bob - so quick. He's looking
}  good tonight"
}  
}  "Sure is Bill"
}  
}  Imperial goes on the attack again with a curly one:
}  
}     How much does a litre of water weigh?
}  
}  Metric comes back quickly with:
}  
}     1 kilogram
}  
}  "Great offense from Imperial there Bob. Combining both measurement of
}  mass and volume - well thought out."
}  
}  "Sure thing Bill, but I think he may have left himself a bit vulnerable
}  here. If I can guess, Metric should follow up with..."
}  
}     How much does a pint of water weigh?
}  
}  Imperial reels back with such a tough one. He hesitates.
}  
}  "Thought he'd do that Bill, he's looking shaky. I wonder how he's
}  trained for this?"
}  
}  Suddenly, Imperial's eyes light up and he comes back with:
}  
}     1.0431758 pounds
}  
}  "Well Bob, our champ got out of that one but it was a bit messy eh?"
}  
}  "It was Bill. I think he was lucky there. Metric should come back with
}  a tough one here if he's got it in him."
}  
}  As Metric prepares for an offense, the champ Imperial slips in a sneaky
}  one:
}  
}     If 1mm of rain falls on 1 square metre of roof, how much water
}     is collected?
}  
}  "What a shot Bob! That'll hurt him."
}  
}  Metric defends without a flinch:
}  
}     1 litre
}  
}  "No Bill, Metric has trained too well and has got too much ability.
}  That reply was instananeous. You know, I think he should follow the
}  same strategy as before and follow up with..."
}  
}     If 1 point of rain falls on 1 square foot of roof, how much water is
}     collected?
}  
}  "Imperial is down!"
}  
}  1    2    3    4    5    6    7...
}  
}     7.97922 fl oz
}  
}  "What an answer! Our boy's still got guts!"
}  
}  "DONG"
}  
}  End of Round 1.
}  
}  "Bill, that bell came just at the right time. This fight shouldn't last
}  the next round."
}  
}  "You're right Bob, but that guy from France is just too good.
}  
}  Round 2: "DONG"
}  
}  Imperial comes out and slips in a gentle offense:
}  
}     How many grams in a kilogram?
}  
}  Metric defends:
}  
}     1000
}  
}  "Playground stuff there Bob."
}  
}  "Yeah Bill"
}  
}  Metric goes for the kill:
}  
}     How many grains in an ounce?
}  
}  "Uh oh. I think this is it Bob."
}  
}  Imperial stutters:
}  
}     uuuhhhhmmmmmmm. Which system?
}  
}  "Oh Bill, he's answered with a question. That's not following the
}  spirit of the game!"
}  
}  Metric replies:
}  
}     All three.
}  
}  "Curtains Bill. I'm sure."
}  
}  Imperial responds:
}  
}     Well in Avoirdupois its 437.5, in Apothecary its 480 and the other
}  one is... What other one?
}  
}  Metric jabs:
}  
}     You tell me.
}  
}  Imperial falls to the floor.
}  
}  1    2    3    4    5    6    7    8    9    10
}  
}  "Knocked out Bob!"
}  
}  "Yeah Bill. I guess we have to get used to the idea of a new system
}  here in the US of A. This guy is a mean lean measuring machine."
}  
}  "Just let me interrupt you Bob, our man Leroy is down in the ring
}  talking with Mean Mr Metric."
}  
}  "Mean Mr Metric that was an incredible last blow there. Tell me what is
}  that other system"
}  
}     Tell you the truth, Leroy, I don't know nor care. I just know there
}     are three and they are all stupid.
}  
}  "Interesting response there from Mean Mr Metric, Back to you Bill"
}  
}  "We've just got word that the judges are going to make an
}  announcement..."
}  
}  After final discussion, the judges have decided to declare the fight
}  null and void due to the fact that the win by Mean Mr Metric would mean
}  that some politicians might lose the next election.
}  
}  You owe the Oracle a life in the dark ages.