1. According to reports it is not due out until later in the year, so was most likely shown to the trade to find out what they think needs modifying for the final release.
2. If you listen to the video and read other reports, it says that the OS has been redesigned to allow easier use of all the facilities.
3. Remember the saying “One mans meat is another mans poison” so while you may enjoy the Yamaha OS, it does not mean that others will.
Enjoy whatever you play

Bill