Current market (desktop for middle aged men who want to remember their youth) is a failure. Target needs to be shifted to the larger (and new to us as a community) market with the goal of obtaining 1% market share. I think we all can agree there is something special about the Amiga, or at least it's spirit that we have yet to find outside of our communities. It's that spark that we need to present to the rest of the world at their level at competitive pricing. That spark needs to be not only aimed at middle age men who remember their younger years playing on a A500/A1200, but also the 30s and under crowd that haven't touched anything other then Windows, Android/Linux, or iOS machines.
as Thomas already wrote all amiga successors are very unsecure regarding Internet. The only protection right now is obscurity. If you want to attract a broader audience you must offer security and for that you would need memory protection what requires heavy changes at the OS. A modernized OS would have not much to do anymore with the existing platforms and the software would need to be rewritten for it. And you need software and services that are unique and had to be developed as well.
Much more important in my view right now would be modern development tools.
Regarding "middle aged man", I am one of those too
There were millions of Amigas sold in germany so I assume there are a lot of middle aged man who can remember of Amiga. If we manage to convince only parts of these the platform would already be in a much better state. To reach the group of below 30 (the smartphone/tablet generation) you would need something completely different including completely new software so I think that is by far out of reach.