Hi Downix -
YES - I meant custom-designed and fabricated chip sets.
Anything you custom-design for the small Amiga market will probably be eclipsed within 6 months to 1 year. Got a few millions to tens-of-millions to throw out the window?
Microsoft supports new hardware features by continually updating the feature-set supported by their Direct-X system. In fact some of their latest software specs for Direct-X are pushing the graphics card manufacturers into developing certain features. Yup, software is driving the hardware. Funny, eh?

You seemed to forget that most/all game consoles are a money-losing proposition. Microsoft's X-Box is still not profitable. Only Bill Gates ego is keeping it alive. They have the billions in the bank to wait it out. Most companies don't.
The best Amiga can do is something like Direct-X but with as few layers of "crap" between the software and the hardware.
Greg