Pressure both from last year (people complained several times that their conference was too long), from Microsoft (doesn't need to spend much time outside of 360) and from TV (again, keep it short). It was still not a good way to show Vita though, and Sony acknowledged this later as a mistake.
Yeah, the WonderBook presentation is less than ideal too. That platform seems to generate some interest among the mainstream press because of JK Rowling, and BBC. I still think they need a digital version of WonderBook.