Apparently touch responsiveness is improved in 2.3. However this article doesn't really explain what's wrong with it. I've been doing latency benchmarks for touch recently, and the highest latency I've seen for touch delivery is 10ms. Now 10ms is pretty terrible for what should be a very straightforward thing, but on the other hand it's only 2/3 of a frame, at 60 FPS.
The argument in favour of a GPU-accellerated GUI which is not mentioned here is battery life. I haven't been testing this side of things, but just because a CPU can do a 60 FPS GUI doesn't mean it should. Deferring it to the GPU would certainly reduce power consumption while navigating a UI. Whether this is non-negligible in terms of overall battery life, I'm not sure.
The argument in favour of a GPU-accellerated GUI which is not mentioned here is battery life. I haven't been testing this side of things, but just because a CPU can do a 60 FPS GUI doesn't mean it should. Deferring it to the GPU would certainly reduce power consumption while navigating a UI. Whether this is non-negligible in terms of overall battery life, I'm not sure.