I dont believe there will be speed limiters, as like what Raptor said the Government wouldnt want to give up all that revenue. BUT, I do believe there will be GPS devices in cars that will moniter your speed wherever you go, and if you go over the limit it will transmit back to base and you'll have the appropriate fine sent to you the next day.
Youll see it happen in Japan and Europe first, then our Aussie Government will come up with so called evidence claiming that it has saved 1000s of lives in those countries so it will do the good thing and introduce it here.
It may happen in the US, but it wont happen in all the states, like Texas :D
1993 ED XR6 M5 (1 of 329)
Turbo on the way!!
1993 EBII Fairmont (Now wrecking, PM if you want any parts)
1988 Nissan R31 Skyline