i'm not a 100% sure what exactly is streamed, but if it is the game's video output being streamed that'll be a no go, you'll need some pretty badass internet to stream phantom without losing much visual quality, input latency will become a thing as well, something VERY important in racing games, especially fast paced ones like wipeout, even a 60ms latency is too much (i play with a 44 ms input latency due to my matrox in between, which is quite noticable, but i got used to it)
Wipeout's already 4 years old as well, it would surprise me if they announced a new feature with a 4 year old game =/

Cipher