Well, it all depends which OS you want to run on your hardware. If you want Amiga OS4.0, then you have to buy an A1. It's pretty simple.
If miniMac could somehow run OS4.0 (assuming that Hyperion were going to port their OS to Mac hardware) then, and only then would Eyetech be in serious trouble all around.
I think that as long as OS4.0 is tied to A1 hardware, Eyetech shouldn't worry.