Politico.com is a good source for evaluations of the chances of significant gun control.
Here's a piece reporting on Bill Clinton cautioning against snooty attitudes and pushing for more gun control:
Former President Bill Clinton warned a group of top Democratic donors at a private Saturday meeting not to underestimate the passions that gun control stirs among many Americans.
“Do not patronize the passionate supporters of your opponents by looking down your nose at them,” Clinton said.
This piece from a GOP Senator speaks to the same risk:
I think that the antigun forces are having a group-think that the entire country is behind them. They ignore listening to the opposition and discard it as nuts (see Biden), but Clinton is warning them as is Reid.