I don't own a Genos but I am happy for all Genos owners that Yamaha seem to be listening and offering a significant and worthwhile upgrade to Genos owners.
Given Yamaha's past practice on upgrades, I think we can all very reasonably expect that this is going to be a free upgrade for existing Genos owners. We have every reason to expect that this is going to be the case.
However, I feel that the teaser video is less specific than it might have been and a bit ambiguous on this, leaving open the possibility that this may not be the case. When you look at the teaser video for 1.4, it prominently described it as a 'Firmware Upgrade 1.4'. On the other hand, the V2 video very briefly shows a flashing counter moving up to 2.0, but makes no mention of firmware upgrade. In fact, it describes it prominently throughout as 'Genos Ver 2.0'.
This of course might be something or nothing and it may or may not be significant - you can read into this what you will. After all, it is a teaser video. Only time will tell, but let's hope it is as we are all assuming - a free upgrade.