Today, Microsoft Singapore hosted a Christmas gathering for media and bloggers. Microsoft gave a demonstration of the upcoming Microsoft Office.
According to Microsoft, there will be 2 variants of the product. The first is probably Office 2013, the plain vanilla DVD that you can purchase at the stores justl like Office 2010. The other variant is a renewable license for a fee. Each year there will be updates and it will automatically be available for upgrade. It is also mentioned that there will be 5 user license family pack which you can install on your PC, Mac and tablets. The license will be tied to your Microsoft ID.
Anyway, all will be clear as the product is scheduled to be lanuched on 16 Jan 2013 if everything goes as planned.