MH no. Every other game yes. I remember when the Monster Hunter on the PS2 had online. It was actually amazing. Sigh =\.
in general this sad genre need to move on from 2004 and be more modern(not talking just about MH alone since the other clones copy the outdated stuff and flaws from it too).
I know it lets me sign into my PS3 and Vita at the same time. I usually play the Vita as I halfway watch something on Netflix. If it allows two Vitas to be registered to the same account, I don't see why it wouldn't let both be signed in at the same time. Otherwise, what's the purpose?
Maybe this lack of focus explains why I start so many games I don't finish.....hmmm.
I get watching something like a boring football match (UEFA CL is not good this year) while playing Vita I do that sometimes,but movies..I don't think I'll able to do that.