If you want to know what Office 2010 Professional will look like then Life Hacker have put together some details about the program.
Office 2010 isn't a huge leap forwards from what Life Hacker mention although a lot more features are now built in that used to require installation of plugins on previous versions of Office.
For a quick run down of images check out the post over at LH who go in to some detail with what's new and what is different from previous versions.