The next significant evolution in the way communities form online is well under way, and it's clear that the focus is on settings: social behavior based not on an ever-growing social graph, but on shared interests and actions at a certain moment in time.
Yes, we're looking at similar kinds of approaches for WatchParty users. In all likelihood we'll build something that works with GoogleTV and AppleTV, but who knows?
That's an excellent question that is raised often when I talk about WatchParty. The fact is, however, that 85% of all TV watching is still live, the amount of live TV people watch is increasing, not decreasing (http://goo.gl/X0mH).
We're approaching WatchParty as a Lean Startup, so we're concentrating on that 85% to start. We know that plenty of folks timeshift, and we want to provide a great social TV experience for you as well, but it makes more sense to solve a problem for 85% of the market first. Of course I believe we'll be wildly successful and will soon solve your problem, too.