yeah the "obsession" with HD is that it looks better, probably sounds better, and a big tv requires high resolution.
Also I've played both games on my emulator running at about 1100x1100 resolution. There is no way that it really looks better at 1080p as the remix has new effects and textures. PS3 is not a huge improvement by any means, but sooo much better than somebody just made it out to be.
Also, the prerendered scenes are gonna be in HD now. An emulator is not designed to upscale video files.
1. Kinda if it would be on the PS3
2. I'm already planning to replay the games
Which is not very economical. Days was criciticized for having gameplay that wasnt varied enough to justify the linearity, and some people dont like linear games to begin with. seriously, I dont even consder BBS to be linear but a lot do. You're not forced forward in that game. The mission structure also got a little dull. Just not worth the time and money, especially with new locations for Neverland, Agrabah, Wonderland which would have to be completely rebuilt from scratch.