The process of copying from system memory to framebuffer with color format conversion is a small gap, where graphics bus is not used (and graphics bus bandwidth is a scarce resource). Fortunately copying is quite fast and does not take too much time, but improvements in this area can help to avoid some framedrops for high resolution movies playback with tearsync enabled (and tearsync is always enabled for video). We could use something like 'page flipping' if we had enough framebuffer memory.