I'm excited to see what sony unveils on the 20th. I know I will be getting the next xbox on launch day but I'll wait and see what is revealed for the PS4 before I decide to spring for the next sony console.
I primarily use my PS3 as a bluray player, but am sure that I will be able to use the next xbox for this purpose. The only games I currently buy on the PS3 are sony exclusives.
I imagine I will only buy nintendo exclusives for my Wii U and will buy all crossplatform games on next xbox. If the next playstion has enough cool features or exclusive titles I will probably end up with one too.