It looks like BD is dominating the wanted feature portion of this post. what i don't understand is that this being a mac enthusiast site and i would gauge there is a significant percentage of folks that would like the option of native BD support and hardware availability, why so much friction over this? BD support takes compromises nothing about your current hardware solution all it does is allow for more options. I honestly don't understand the comments that say "blu-ray sucks" or "up scaled DVD's look just as good", it is the HD standard right now, allow us mac users the same hardware options as windows boxes. Not only that, but apple has been on the board of directors for BD since 2005, no excuses, give the people what they want.
Depending upon how close one sits to the screen and the size of the screen, it is usually difficult to determine whether high definition is better than standard DVDs. I have a 1080p projector system with a 92" screen and I can tell you the difference is noticeable. Standard DVDs upscaled to high definition still doesn't look as good as a Blu Ray or HD DVD movie because the information encoded in the high definition disc is far greater than a standard DVD. With smaller TV screen (smaller than 60") the difference is very slight and with smaller computer screen the difference is even less noticeable.