While the information is still unconfirmed, the talk is that the leaked slides from a Microsoft presentation regarding the next Office version, are authentic. WindowsSuperSite features two articles, the
first talks about the new Office version, codenamed NGO, but the
second set of slides, is the truly interesting part, explaining how the subscription/renting .NET model will work with Microsoft's upcoming Web Services. In fact, it seems that Office will be the leading application in this new sales model, which will help promote the subscription model in general, however a "traditional" licensing method will also be available.
Update: Some
analysis of the NGO presentation can be found at ExtremeTech.