I'm really looking forward to PS4, (after this Xmas i really will have had my fill of Fable, Forza, Halo and Gears) so i will more than likely go with Sony next gen.
I just think people should hold their expectations back a little or risk being really disappointed.
At the end of the day they will want to get it out for $400 and it has a manufacturing cost, power and heat envelope to stay within.
Even using a nice AMD Quad Core CPU, a 1.8TFLOP GPU and 2GB's of Ram, it's still quite a power leap over PS3 which is still to this day pumping out games like GoW: Ascension, Last of Us and Beyond.
My main hope for PS4 is that the architecture is built so that multi platform games look / run the same if not better than the 720 versions.
Continue to improve PSN (even if it means charging for it) and it will be the perfect console for me.