Mashman:"As someone still with MCE 2005 (and relatively happy with it) could you elaborate on what makes vista mce so superior?"
MCPL allows plugins to use the Media Center interface, this means that plugins have the exact same look and feel as the rest of Media Center. Plugins that use the MCPL also do not have the lag/sluggishness inherent in HTML plugins.
With Vista plugins you really can't tell what is a plugin, and what is origional Media Center.
Mashman hit the nail on the head, but there are other things I like a lot more about it. I don't particurlarly try to hawk Misrosoft products (see my previous post and you'll see why) but in this case, Vista media center is a lot more responsive than MCE2005 in my case.
I can only speak for a user with a 360 as an extender... I never touch the computer itself and when I do, it's through VNC since the computer is upstairs in the office in a corner without a monitor.
The interface upgrade it much more functional and "snappy". There are preview icons for all recorded shows that the media center generates for you. It's a visual and preformance upgrade (granted, I've disabled all non-essential windows services since I use this machine as a dedicated TV-recording device). There's also a lot of upgraded functionality when it comes to searching, sorting, and filtering the guide (in terms of sports, movies, etc.). I love the feature that allows you to see movies on "next" (not sure, but I don't think that functionality is in MCE2005).
I don't think this is the right forum to discuss benefits/detrements of either system, but there needs to be a decision about Vista-only or cross-platform development. I guess it comes down to whatever is the easiest for the developer to implement.