With another Steve Jobs keynote about to kick off, I'm going to indulge in a little speculation. Apple will greatly embrace HD. This shouldn't be a big surprise -after all back when I was there, the high-end uncompressed HD editing in Final Cut took off, but at the time uncompressed was needed as a way to keep the slow CPU out of the way of the fast disk and screen. Since then, Moore's Law has meant that computers are now almost fast enough to decode HD across the range, so HD Movie Trailers and iMovie HD are both widespread.
With Apple about to refresh their high end range, I expect a big emphasis on HD, and Blue-Ray storage. The more interesting aspect is that Apple is well-placed to do and end-run around HDCP/HDMI and all that nonsense, as they sell the screens as well as the computers. The iTunes store has been selling low-res TV shows for $2 each, so they have the makings of an entire distribution chain for content.