Besides the much anticipated Outlook coming in the Office for Mac 2011 suite, it looks like Microsoft is working hard to bring seamless compatibility in it's other apps with its Windows counterpart, Office 2010, not to mention some snazzy new icons...
Although we use iWork to create our company's forms, reports, and presentations, we have a good amount of clients that still need MS Office after switching to the Mac. For some users the Mac version has always lacked some specific features they had in the Windows version, most notably in Entourage and Excel. Hopefully this 2011 release will bring the rest of the Office for Windows features you've been asking for!
Check out Microsoft's Officeformac.com website for some videos previewing some features of the next version of Office for Mac.