1. Vista utilises 16 GB of space and 700MB of RAM
2.

Flip3D is activated by utilizing the Windows-tab key combination. Once invoked, it can either work just like alt-tab or you can use your mouse wheel to flip through all of the windows.

I like the effort here, but I think that Expose on OS X is still a little more useful in that you can can choose between seeing all windows open in a particular application, or all windows open on the entire desktop.
3.


Vista has been an extremely ambitious project. Having previously worked at companies that develop software, I can appreciate the task of developing something as complex as Vista. With Beta 2, it is apparent that there is a lot of potential for Vista to be something special. Microsoft needs to take some time to work on consistency within the user interface. Transitions are nice and all, but you can’t have a nice fade-in for one direction but nothing going out. Find and replace the old icons too, please! I can’t believe some old Windows NT 3.1 era icons are still around. Can we also lose the NT-era dialog box?
The above dialog box is a relic and hasn't been touched in oh... 15 years, I'd guess. Hopefully it makes the final punch list for Vista.
4. "One of the FIRST things said in the C|Net video is that Vista BORROWS from Apple Tiger OS"
5. "Oh yeah, by the way, even though Vista looks fantastic graphically, it will take a gig of RAM and top line specs just to do it! The old performance hog is back in action!" - by tech_geek
6"Who really cares if you can search everywhere. I don't. If I can't find something on my own machine, then I consider myself incompetent. These upgrades are just like XP. All show, no go. The only thing I'm looking forward to is the new graphics engine and hopefully better system management."-by andboo1
7."Is Microsoft going to buy me the new $400 vid card I need to really be able to use the advanced graphics on all my pcs?" -by sean2078
8. "Windows Vista would have been top of the line in 2003 maybe, but in the later half of 2006, it is just too late and weak compared to MacOSX. Tiger has been released and has thrived and a newer version 10.5 will be released in the next year, possibly near the time that Vista comes out.
Windows Vista is simply not up to the standards of a smooth, visual, secure, and idiot-proof operating system and will probably need severe upgrades to even put it in the same sentence at MacOSX 10.4 Tiger."-dma315