That stream is why I put it on my wishlist (originally the PS4 version, of course) on Amazon, but I'm glad I held off because while I'm sure it's fun on the PS4, I love the idea of taking this to the couch while I watch TV or on a trip, or even just on the back porch when the evenings get warm. SRGP's on a hand held are the dream, man.
I am generally pretty sensitive to hitching and stuttering myself, and i just haven't experienced any yet. Considering the hardware is the exact same, it could just be that I haven't experienced it yet but if it's going to be that rare I don't think I'll mind much. And it really did look amazing on my TV at whatever resolution it's playing at docked, so I'll probably play on the TV quite a lot as well.
I wrapped up the demo and enjoyed it quite a bit more than I had assumed. Enough that I pre-ordered it anyway. I read that I can import my demo save into the full game, which is (edit - NOT TRUE).