Cairo inclusion finally also paves way for Cairo/Glitz at later stages in GNOME as complete composition manager. After that we have Luminocity getting ready for Metacity.
Three yay for GNOME Hackers.
ujjwal, There will be speed improvement but more importantly there will be even more eye candy. The default hack of composing the graphics like the primitives like rects and circles ET all on the widgets will get rendered in raster format, anti-aliased.
If I recall it correct the font too will be rendered with it, that will make them visually high quality and same level for every other library graphics.
I will probably wait if PCQ**** will distribute it, generally they are the ones will give good coverage to Linux stuff.