I checked the specs and it isn't that much better than the current MacPro. It is a screamer but I wouldn't give up the security and strength of Mac OS X for a flashy computer with nothing more to add then "fluff." And Vista, no matter how many service packs it has, will never be a complete and secure product to do any sort of deadline driven business off of; if I were a windows person I would stick with XP until I had choice.
Jobs isn't as much of a cheap-skate as Bill or any other company CEO is. They all want money, I want money, you want money; you might as well but "One Dollar" in front of all of our names.
Tool-less entry was pioneered by lesser known companies before Apple or HP or any PC maker got the idea. The most successful integration of it however was the PowerMac G5, then the MacPro took it another step further.
The RAM gets up to only 8GB, that's okay for gaming, but video production and high end graphics could use some more... like 16GB.
Other than the graphics and the extra HDD which isn't that much of a benefit anyway, the machine is decent at best. Great for PC Windows Gamers, I dream to have in the next revision of the MacPro, but I will be expecting better by that time.