On a whole, for me, GamesCom was a disappointment. I was not swayed anymore than I was yesterday with respect to making a purchase. I have pre-ordered a PS4 with a few games though. I am still uncertain if I will get it at launch since I generally do not buy systems at launch, so if not then at least by March. But the point still stands that I had already decided to pick the system up before today and my decision was not reinforced by today's events.
As for the Xbox One ... that depends on my friends and the true exclusives Microsoft brings to the system. If a significant number of them pick it up and the games are appealing then I'll get one. That wouldn't be until 2015 or so since I intend on getting a Wii U next year as well and a 3DS with a bunch of games (plus Vita and PS3 games). Fun with friends, irrespective of the platform, is something we all should aim for.
Playstation = The Beast from the East

Sony + Nintendo = WIN! PS3 + PSV + PS4 + Wii U + 3DS







