It was very telling that the only gripe to come out of the season 3 finale was the angle used on the very last shot. Did Jesse aim the gun at Gale? To be honest, I had absolutely no doubt that Gale is dead. We'll see how season 4 starts out, but it would appear that Walter and Jesse have survived... for now.
The downside about this episode? I'm now fairly certain that the only plausible ending for this TV show will be the death of most every major character. The stakes are now so incredibly high for everyone involved that the worst is bound to happen. I know some people are unable to watch the show as a result of the mounting tension, but it's so incredibly, artfully constructed that you have to keep watching.