Well, actually black gets two rooks for the queen, so it isn't really trapped as such. But yes, in that case he has given up his h5 knight for just two pawns (f3, h5), and a ruined king side. With a queen looming large, it's probably lost. But I think Gelfand should have resisted a while longer.
Gelfand looked quite cheerful in the press conference, though. That's a good sign. Reminds me of Leko's mood after his first round loss to Kramnik. At that time, Kramnik looked grim despite the win, and Leko had looked cheerful, which bode very well for him for the remainder of the match. Yesterday, Vishy was very terse in his replies, if not churlish. Today he's somewhat relieved, of course.
Gelfand evidently wants to read it as no more than a miscalculation. But coming back from behind in a tight situation would certainly bolster Anand's morale.
Both defenses have now been punctured. Will Anand return to a regular Slav now, instead of a semi-slav, now that he has shown discomfort with a bad bishop...? And where does Gelfand's team look to against d4...? I think they'll at least pause for a game. That should open up possibilities for Anand, since it looks like his main preparation was outside the Gruenfeld.
The fellow who thinks he knows it all is especially annoying to those of us who do.