Yeah they announced the free MS Office Student version deal 6 months ago for devices releasing with Windows 8.1 and 10.1" screen or less that we are seeing now from late 2013 and moving forward. Windows RT devices regardless of the screen size will and have as usual got free MS Office. First wave of these 10.1" devices that came with Windows 8 x86 will probe never get the free Office.
MS have confirmed that they are already working on Metro version of Office which as per Mary Jo Foley of ZDNet said that it will release mid next year. OneNote is already there so We can expect similar style UI and UX.