What are you talking about? Ten years ago it wouldn't even have been a possibility, let alone a realistic one; now, we're finally starting to see some progress towards a more powerful Amiga-compatible (note the emphasis on "compatible," as in "not just a generic PPC/x86 system that's adopting the Amiga name?")
What am I talking about? 10 years ago PPC was still broadly speaking a contender. It had active development behind it for the desktop market. The Amiga community was ten times or more the size it is today, we still had large numbers of commercial grade apps being developed for.
By 2003 that was all gone. All of it.
The market doesn't have to be split binarily between "direct recreations of original hardware with no extra power or features" and "bog-standard x86 clone system running software that's somewhat modelled on an older OS people liked."
This is exactly the kind of nonsense that I'm talking about.
The desktop market is saturated. It is mature and unless you have a bank balance not unlike either Sony or IBM, you are not going to make a dent into it. There is no place for Amiga outside of the retro set.
Assuming that the people behind projects like NatAmi do see them through to completion, and transition them to a business sanely (where "sane" is defined as "not charging $2300 for a 2GHz computer,") it can work.
Within the hobbyist sense maybe, as a viable business, not so much. It is doubtful the developers will ever sell enough to recoup the development costs of the natami. That's not to say however that they won't make a few quid out of it.
We live in a world where $50 will buy you a clone of a game console that used to cost $200-300; producing an affordable boosted-but-not-bleeding-edge clone of the Amiga is perfectly within the realm of possibility.
Who the hell said otherwise dingus? But a Natami is in no way going to be a contender outside of the retro crowd. As a piece of technology it is interesting and will no doubt have some pull at the geek crowd. As a mainstream desktop? Hahahah. My Tocco Lite feature phone packs more of a punch.