I don't know how Sony plans to stream high definition games instantly as their goals claim. Gaikai currently isn't even close to streaming PS3 games 720p or 1080p at 60 fps reliably. I doubt even a fraction of the PS3 library will be available on-demand and I'm sure we'll have to repurchase our PS3 games.
A PC platform! This is the best new of the entire press event. The APU, the 8GB of GDDR5, the unified architecture, etc. are all great I'm pleased with the hardware. I do hope this means less exclusivity for consoles but that is unlikely.
Why does my controller need a touch pad, glow light, headphone jack, share button, and stereo camera sensor? Why do I need move controllers now that there is a Kinect style stereo camera peripheral?
I thought remote play already existed with the PS3? Why can't Sony develop smartphone apps to work with the PS3? Some of the new features of the PS4 are disappointing because they could be implemented on the PS3 but haven't been. It's as if they've been holding off innovation for the PS3 and Vita to make features such as remote play and smartphone integration more appealing on the PS4.
As for games I thought Destiny, Watch Dogs, and The Witness all looked interesting but won't all those be on the PC? Maybe not Destiny? The Killzone preview was gorgeous although I noticed some texture pop-in. Where was Naughty Dog? Error 37?!
With games like Destiny and Diablo 3 being developed for both PS3 and PS4 I expect development for the two to overlap much longer than for even the PS2 once PS3 was launched, which lasted for years. I don't plan to buy a PS4 at launch, but I welcome it with wide arms and can't wait to see how it will innovate the industry.