I can answer a couple of those...
- It runs classic Amiga software that makes proper use of the O/S. For other software a port of UAE is available, so OLD-SKOOL games should work as well as they are emulated.
- Same as AmigaOne? No, not if you want to make use of Amiga OS 4.0 and whatever features that has because it won't have the BIOS required to legally support it.
- I won't buy it because I don't have any disposable income at this point in time! (...but I also don't know how much it costs, whether there will be bundles or offers or whatever)