I've got multiple desktops on my laptop, its just a download if you really want it, mine came with the GFX drivers, and gesture control. You'll get sick of it soon, I did.

I dont think you can run windows apps on it, or games, unless its via something like parallels, but like bootcamp with mac, why have a dog and bark yourself?

If your going to use it use it for propriatory stuff, that way you'll get the advantages of it with low overheads etc.

Remember that any new equipment may or may not work depending on drivers. And you'll be restricting yourself in that, as well as any other things you need to attach (as long as theres drivers remember to check first though)