If this thing can store and play arbitrary video files (to the limit of Quicktime's capabilities) and gets an app for Netflix streaming, I actually think it'll be extremely useful for me in that I can finally separate my entertainment machine from my work machine. It looks like it's only MPEG-4/H.264 friendly, but that may be enough if that becomes the standard. (Letting it somehow play DVD's--even with just a "DVD dock"--would be helpful as well, but I have a laptop fully capable of converting DVD's into H.264 anyhow.)<p>My suspicion is that next year's iPad will be the one to push the concept over the top for me. Though it's already compelling as an ebook reader and part time laptop replacement, one more iteration will seal the deal.