My Opinion after hearing it live is;
The Tyros 3 is what the Tyros 2 should have been.
The fact that you can now add sound packs to the T3 also means that the extra sounds will be the same quality as the internal sounds. (No longer do you have to change the board to get new manufacture quality sounds)
It’s the most balanced board out there, (A record previously held by Korg for many years) as most other boards have some fantastic sounds, features, styles etc that stand out above the others. (Thus you end up wishing they were all of the same quality)
If you have a Tyros 1 then it is a no brainer. (Get your order in now)
If you have another manufactures board, get up off your backside and go out and try one.
Tyros 2 owners, go out and try it, and then make a decision.
Dealers are already selling shed loads of the Tyros 3 (And the stocks haven’t arrived yet) so if you want one get your order in early.

Bill