You are right, MS did copy a lot of stuff from mac os… but keep in mind that when windows v1.0 was being developed, they copied every single thing from apple, LOL… so that’s nothing new really…
However, they did improve the security quite a bit. I was surprised. The next major release of windows will have it’s own filesystem (no more NTFS), which will be much more secure than anything MS has ever built. It is something they wanted to have in Vista, but they didn’t have time to release it. It would have taken another 2 years or so…