The only way this will succeed (as in: the coins get used
by people) is if:
* the coin is tangibly larger than the quarter
* and the paper dollar is discontinued
* (and probably the half dollar as well)
Otherwise people won't use 'em, and vending machine
makers/operators will not re-tool for them.
Dollar coins have never been particularly popular.
The traditional large dollar (up thru Ike) is too big.
The Anthony and the Saccy are too small.
The Ant and Sac debacles entrenced vending machine
resistance.
And if Bubba is on it, half the country won't touch
it no matter what size it is.
Being a traditionalist, I don't know if I would like the multi-color, multi-size bills.