True it very much is...but I think even that is better served with optional storage, since people that really want to download movies, etc, will probably want a hard drive that is much bigger than what these machines ship with stock anyways. Plus, supporting external plug in drives (which so many people have) means 1tb+ of storage will be cheap and easy for anyone to add on.
That was probably just speculation on his part, and doesn't really relate to final performance anyways. Doubling cpu or gpu power sometimes opens up new techniques which can result in far more than a 2x perceived improvement. I guess what I mean to say is that how good something will ultimately look on screen is not necessarily linearly related to the quantified power increase of the hardware.
Not sure why people are so hung up on 1080p. Put it this way, hook up a modern pc via HDMI to a nice hdtv, and run the latest games at 720p on them with an Ati 4870 and 4xmsaa. You'd be amazed at how far better they look than any current 1080p console game.