Linear RAM adressing, protected memory, more cpu registers 
well, uhm, how about just a nice PC then?
damnit, it's a freakin' MSX we're talking about, aaight.
U know USB is perfect. Old joystick will be rare soon.And there is a lot of USB gamepads,keyboards,flashdisks,3"5 fdds,printers...
I got HP PC and I think there is no nice PC out there in the whole world.
Maybe Apple Mac + XP 
I'm afraid that will only lead to a GFX9000 sequal. There are still no real games for it.
speaking of which:
- a 4 layer 16 colors per layer 256*192 pattern mode
- a 2 layer 64 colors per layer 256*192 pattern mode
And line interrupts that are as I would expect.
patterns with mirror bits, of course.
and multicolor sprites with multiple sizes, also with mirrorbits.
well, uhm, how about just a nice PC then?
damnit, it's a freakin' MSX we're talking about, aaight.
We're talking MSX3 here, right?
the turbo r scroll commands
And some damn fine veejay program hahaha,
something to alter plasmas, cubes, 3d objects,logos and fancy effects with
a midi controller ^_^. So far only the gameboy advance has a vj tool I guess.
Considering that it has a decent SVHS out, and VGA.
oh, that's indeed something: does it have a long slow and boring bootscreen? (msx2 scroll is a bit annoying )
new set beep sounds