use OpenGL for rendering, which allow some nicer ui effects, and of course, more power (thanks armada, fincs, subv... for theire work on mesa/nouveau)
point filtering can now be used in any rendering size
add a few libretro shaders (retro-v2, scanlines, pixellate, crt easymode, crt geom, sharp bilinear, sharp bilinear scanlines, sabr v3, xbrz, supereagle). Note that some shader will work better in integer scaling (2x, 3x), and some will have a better effect with linear filtering (sharp bilinear). Also, some are very intensive (crt geom, sabr, xbrz) and may not work fullspeed in some emulators (pSNES).
add fps counter option