One point that is assumed but not proved is that a 76 Tyros would automatically mean that it would be a “pro” keyboard.
If a pro has a Tyros it would be because of the sounds and features not the 76 keys (as we can see by the ones who use it on this forum). The point about a 76 key Tyros taking away sales from the pro division of Yamaha is not supported. If a “pro”/WS user wanted a Tyros, he/she would have gotten it already because of the sounds whether it is 61 or 76 keys.

Another wrong assumption is that if the Tyros were 76 keys “home” users would not buy it. Why?? With all the discussion, no-one has presented a reason why a home user who has a 61 key Tyros would not buy a 76 key.
Quite the opposite has been demonstrated. Just look at the physical difference between the T1 and T2.
As long as it is not heavier and much longer, as long as it is not much more expensive and as long as it has the superior sounds, styles and OS, a 76 key Tyros would not bother those who have a 61 key Tyros already. After all, a 76 key Tyros would not have anything that would drastically change the Tyros and would not affect the Tyros in a negative way. The only change is that it would have 15 more keys which if they do not want it they can choose to ignore. The same way that the T3 will have a MP3 player they can choose to ignore it.