Take a look at what the boys in Redmond want to do with Vista’s follow-up: basically, charge for every little aspect of the OS, and ensure you have no control of the hardware YOU paid for.
We remind you at this time that OS X is far more open, and that Linux is actually both free and Free:
The message is clear. Get out while you can. Microsoft’s only interest is to empty your pockets and keep your computer hostage. It wants to turn computing into a monopoly content distribution channel and sell you to the highest bidder. Choose freedom and switch to Free/Open-source software.