What do you mean by APU - if you mean a cpu with build in graphics then there are lots of desktops like that (mostly Intel) and they work great for non-gamers.
If you mean the AMD mythical thing that was meant to use the gpu to do lots of tasks previously done by the cpu then that has never really existed outside of powerpoint slides.
If you mean the AMD mythical thing that was meant to use the gpu to do lots of tasks previously done by the cpu then that has never really existed outside of powerpoint slides.