"How many of those newcomers will go for the 2000 euro Aone not capable of running anything else other than OS4... not many. If any...."
We won't have newcomers. We'll have people like myself who ran Amiga OS >15 years ago, who've kept a vague eye on Amiga developments every few years in the hope something interesting has happened.
Those, when hearing of the new 'Commodore Amiga' will quickly become disallusioned when they realise it doesn't actually run Amiga OS. Thos who hear of the Amiga One X1000 will have the option to spend some (albeit serious) $$$ to support the new platform.
Given the amount of money people returning to Amiga seem to be spending on tricked-out A1200s (towered, PPC, zorro expansions, GFX cards etc) the price of the X1000 doesn't look so bad. It's these people who'll buy and make the machine a success; not newcomers who as you've correctly said will not go for a box "not capable of running anything else other than OS4".
Amiga is extremely unlikely to ever return to the mainstream. However, this doesn't mean the brand should be confused/abused by generic intel desktops running incompatible OS's.