It's too buggy as of right now, you will have a hard time finding the right drivers for all your hardware and it's just not worth it as of now.
If you are looking for something a bit new in windows try the Media Center edition and get a TV tuner if you don't already have one, it's like TiVo except much less expensive.
There are benefits though like Farcry and HL2 now both have support for 64 bit CPUs. I'm not sure about if there are any visual improvements in Half Life 2 but there are in Farcry. And both games supposedly run faster.