It was specifically mentioned in the PDFs released at 2.0's announcement, was discussed in various interviews as well.

http://forum.square-enix.com/ffxiv/t...ods#post565958

http://www.bluegartr.com/threads/107...-Transcription

http://ffxiv.zam.com/story.html?story=28181

Yoshi has sad multiple times there will be add-on support (apparently using Flash). This shouldn't be news to anyone here.