What are the differences between Microsoft Office 2010 and Microsoft Office 2007?

I have Microsoft 2007 on a four year old computer and just got my new laptop just about 2 months ago and I am setting it up with everything I need getting ready to transfer everything over. My main question is, is Microsoft 2010 worth the time and money? Me being an IT guy, I need to keep myself updated on all of the new tools, but I need to know for sure if this is the right purchase for me.

I would be transferring not only my email account, but all of my emails that on my computer. Does Outlook 2010 have an easy transfer where I can just transfer all my settings/emails easily instead of having to go through and back up every single email with Norton?