Agreed.
But in order to support the development of a "custom" OS they need a stronger business model than the one they are currently presenting. Sales based on nostalgia isn't going to be enough to drive that kind of development.
Only time will tell...
Depends on which line your talking about. C64x? Vic series? Amiga series? If your talking nostalgia for Amiga series, your quiet correct, there isn't any to tap into for the number of unit sales Barry is looking for. That will require something more special with excellent marketing.
For right now, just watch what happens with the C64x as that is the first product line to get the full effort. Vic and Amiga series will follow afterwards but you should be able to tell how it will all be done using C64x's launch as a benchmark.