Yes, but why do you want 120 FPS...?
You cant really see much difference between 60-120 - even less so between a single 670 which will get you 80 FPS ish on most games, and SLI to get 120 FPS.
As for the movies - they're only recorded at around 24 FPS - even the blockbusters. Makes no difference whether you have a 120hz screen with 670 SLI or a single 60hz screen with a 610...
Anyway - I personally think you'd be better off with a 60hz IPS screen if you watch a lot of movies.