While we already know that by the time KDE Software Compilation 4.7 rolls around it may optionally support OpenGL 3.0 within the KWin compositing manager, but with time KDE's Plasma may begin using more OpenGL too. Aaron Seigo has written a lengthy blog post about what he hopes to achieve with Plasma and its library going a few releases out into the future. This includes a rather extensive rework of Plasma and its drawing, which would include the use of more OpenGL to allow for greater hardware acceleration.