Just my less than expert opinion:
1) There will be changes in background checks, and the private sales market could change dramatically.
2) Any legislation involving specific weapons (AWB), ammunition, or capacity will have a hard time passing any time soon. Yes, they'll still go after it. But this seems destined to be a slower developing and potentially unsuccessful (for the "gun control" crowd) undertaking.
3) AR/AK/high capacity guns, parts, ammunition, and especially magazines are going to continue to have demand out-weighing supply for the foreseeable future. Probably at least throughout 2013. You will still see some available from makers/distributors at rational prices, but those will often be gobbled up in seconds and simply re-sold at crazier prices. Eventually this will result in a more permanent price increase direct from the makers. In many cases that's already occurring. Business logic sort of dictates that if the masses are fighting to be the first to hand you their money, you temper that appetite a bit by raising prices.
ARs and other high capacity guns aren't going to banned tomorrow. They probably won't be banned this year. But the constant political/media pressure is going to result in a nutty market throughout 2013. And my opinion is that to some degree, the market has been changed permanently.
"The Future is Unwritten"