How about have a 3D custom chipset that compete with PS3 graphics....that is a beginning of enticing me to sell my A4000D for this "MiniMag+". But if you are telling me it is the good old AGA with more CHIP RAM even if it is 1 GB CHIP RAM is nice...but I am ok with what I have.
I think you have unrealistic expectations, even PS2 graphics would make your A4000 cry.
I'd settle for PS1 graphics without requiring a mortgage. It would at least be doable and would make some software possible that wasn't before.
It would just need 15 bit rgb chunky output and some new blitter modes.