What are the major differences with 64-bit? I mean I've looked it up, and nothing seems major. I was just wondering if anyone could tell me what makes it better.
Nah; the Beta version has been out for about a Year They have been meaning to bring it out for a few months now though but considering most of their programmers are working on Longhorn its not surprising.
If you can - wait for a PC Upgrade until then. Get a New Intel Dual Processor and Longhorn at once. It will make all the difference really and for best Longhorn use you'll want a new Computer of the Time.