It's probably been said, but tying OS4 to specific hardware keeps everything under their control. If OS4 were an open platform (not open source, just open specifications), you'd see boot loaders, drivers, and other bits popping up for all sorts of platforms: Mac, Gamecube, PS3, Xbox 360, RS/6000, iSeries, etc. Platforms based on the PowerPC and its derivatives are plentiful. Amiga, Inc. legal issues aside, Hyperion is the only thing between OS4 and a solid, open future.