A good ideea but other thing it is to resolve the license. The “.blend” it is user license where BGE is gpl ?! So the BGE must be made compatible like BSD or other license that permits .exe and android app to live with the .blend.
For IPAD and other Tablets with Android etc a blender player with play animation function will be right solution. But even that will be to cpu eaters for them.
BGE export to .exe , android app , osx app , linux binary -> good ideea.
Regarding modeling , i don`t think it is usable , Blender now needs minimum 1 GB Opengl 3.0-4.0 video card to run.
Gamekit looks that does not support GLS , logic , some texture option … sounds very limited to `99 era games.
The main ideea is that everyone to be able to do games. Lots of game designers were not programmers , iet they had friends programmers.