The problem with going to x86 is the massive hurdles faced when trying to support every x86 combo under the sun. Hyperion are a small company and if they want to make their OS viable, then they will opt for a smaller number of mainboards to support. I agree with them on this part.
Of course if they had the corporate muscle of Sony or Microsoft, then they would have no reason to make such concessions. Having said that, I look at OS4 as a stopgap in having a more advanced solution, compared to the old classic Amiga line.
I don't see the point in discussing why OS4 won't go x86 or why it won't have custom chips? Its a moot point. Everyone knows that its money and market forces. So ask yourself this, will x86 survive indefinitely? Eventually there will be 64 bit computing, and believe me Intel are having big problems with maintaining native backwards compatibility. I think that in the next few short years, Intel and AMD and especially M$ will be facing the same kinds of problems Apple faced when going PPC, or what we are facing right now. The difference will be that Amiga by that time will be well and truly established on PPC. It can only get better from there on.