That's an excellent question, and one that I don't think I've ever seen a really definitive answer. It could be that the display uses 1280x720 mirrors on TI's chip and leaves the other fringe chips alone, or it could be that the display makes everything 1280x720p and then scales it to 1366x768p. Some things I've seen would suggest it's the latter (768p projected) but since I ended up going CRT two years ago I never really figured out for certain which it was.