Custom hardware for a small market is always going to cost a lot. At least this computer will be pretty fast for a PowerPC Amiga.
Of course AmigaOS needs to move to ARM* ASAP - cheap hardware, soon over 2GHz, great support, etc. If Hyperion set themselves a target of ARMv8** in a couple of years then they can use the opportunity to bring AmigaOS to 64-bit and add in the missing features (memory protection, etc) at the same time. A clean break for the future.
* Being the mass-market powerful but cheap CPU of today, much like the 68000 was in 1985. By cheap I mean a system-on-a-chip costing under $30.
** Besides 64-bit support, this brings some nice architectural enhancements - 32 registers like PowerPC for example.
