> Is GPU& shader  support necessary/desirable:
> yes if real-time rendering for thighs like games/VR are important, but 
> in that case there
> is a bigger problem jitter caused by GC,
In the image I just uploaded two days ago and that one can get from 
http://www.zogotounga.net/comp/squeak/rogue.htm the main feature is a 2D 
real-time top-down game.

I found that the GC-caused jitter was indeed a problem, but also that 
the main culprit was the time it takes to simply paint an image which is 
a surprisingly (to me) slow operation.

That, plus the alpha-blending issue that was discussed on the VM list a 
little ago, where Juan proposed two new primitives.

Stef