A Next-Gen Amiga with AROS would run it much faster than AmigaOS4 or MorphOS.
Seriously though guy, you're clearly a rocket scientist.
@Cosmos
Good stuff, and thanks.
Will give it a try on my 40mhz '040. Im not expecting miracles, but if it can reach 10-15fps at half sized window I'll be a happy man. Mostly novelty value, but still very cool 
Can be even much faster I guess : for example, the minigl stuff is slow... I'm going to give some examples on my forum...