Just for the records, phoria.js ( http://www.kevs3d.co.uk/dev/phoria/ ) looks promising for handling issue client side with compromise on graphic quality.

GMA 950 which is ancient but not much

Mid-2006. That's a full decade, a veritable fossil in graphics. :)

GMA 950 which is ancient but not much

Mid-2006. That's a full decade, a veritable fossil in graphics. :)

Fair enough, still far better than S3 Virge :P

Seriously, I am convinced of making in webGL only and consider fallback only if it's trouble free.