The 360 catalog of games available to buy digitally on day 1 might convince me to buy it at launch. I sold my 360 a while ago and it would be awesome to catch up on the back catalog while waiting for all the new games to come out.
Also, it would be nice if Microsoft could see the light and allow access to Netflix, Hulu, and so on with just a silver membership, but my guess if they'll have another tier for those people who don't want gold but want video streaming.
I don't have one anymore because I only played it at home, and at that point, why would I play on the psp or vita when I could just play my ps3. My lifestyle just doesn't fit with a handheld system. If I really need something to play I'll just download something quick and cheap on my iPhone.