Visual Studio 2010 Beta 2 comes with a "Go-Live" license, so if you are ok dealing with beta software, then why not? I have tried it at work myself, while the other developers continue on 2008, but I have to be careful with the project files, to not check in changes, etc.... I don't use it all the time, yet, because it's a memory hog, but other than that performance is a lot better.
There are also a lot of features that are worth the upgrade. The text editor is in WPF now and scales nicely with a ctrl-click and I find I use it a lot. There are a lot of new addins being built to integrate with the UI because the new framework for the code editor exposes a new addin model that is much easier to develop against.
Being able to split windows across multiple montiors in a more flexible way is great.
If you go for the "Ultimate" versions, there are a ton of new architecture and modeling tools and tools for exploring code. I love the ability to generate a sequence diagram from some method and use that while I am reading some unfamiliar code. Works great.
The list goes on really, I have barely scratched the surface, so yeah move on if you want to learn how to use the new stuff, and no one is stopping you, go for it.