As I'm already using Windows 8 I'm now looking forward to the new Office and Surface. I don't think Office will be as big a change as Windows 8. It seems evolutionary rather than revolutionary. However, I am looking forward to the Surface reference hardware.
Agree bill, however I am using Office 2013 preview on my Win 8 and it has some well noted changes like keeping track of where you last left, save as - or save location have option for computer, skydrive, or SharePoint or even option to add a place (kind of cloud ready!)
I've only read about the Office 2013 features and haven't tried the preview. Other than the cloud tie-ins I haven't seen much else that might make me want to upgrade. Are there any other big changes you've noticed using the preview?