Netflix was the biggest cool surprise with the 360. I already had netflix but the "free" streaming on demand of TV shows and movies is a HUGE plus. HUGE. I love it. No waiting for the mail and no waiting in line at a rental place. The convenience factor is 100%
Once you adopt Blu-ray, you ultimately get a component Blu-ray player as well. Samsung makes the best ones with HQV. Their firmware offers free Netflix streaming (which I don't use after a few samples and see no need for as physical media is so much better). Sony doesn't really need Netflix, it has an insane library to stream already for people that think its cool. It would be a nice option, but like I said, renting physical media yields a better picture anyways.
PS3 resurgance by GOW3 - Check! Mass Effect for PS3 - Check! Diablo 3 for consoles? I say "For sure"!