Full sized pistols are more accurate but I think we'd see a lot more polymer makers making single stacks if it's a retroactive ban. Frankly, I see about 2 years at least before it happens. Personally, I think the inability of the govt. to do anything at all, let alone anything right, in the last 5 years or so will lead to a delay on legislation both good and bad. That's my opinion, though. However, with my current and long lasting affection for wheel guns, I'm limited to 8 or 9 anyway. It will make me mad, but it won't affect my collection.
I think with ammo prices, the 1911 won't be as attractive as last time. .45 ammo isn't cheap like it was. Frankly, I'd like to see single stack polymer 9mms from someone other than Kahr anyway