50%? You've got to be kidding me.
At most, Dreamer is confirmed to run one commercial game, the wince-based Namco Museum Classics. Of course, the version that plays this is unreleased.
DreamEmu is supposed to be able to play one or two commercial games, or it is going to soon, again, unreleased.
boob!cast (hi CyRUS
) plays pretty much all homedev stuff, but no commercial games (afaik, that is).
There you have it.