I think APU might be the future. Athough someone above might mention that the dye is too small and the power draw is huge, i believe that that is not the main issue. We can always make the dye larger, have a new socket, and add more power connectors when it's nescessary. Just think of it as something like intel's knights landing, bigass dye with more power connector. APU can solve a lot of problem we currently have with the standard GPU such as latency and bottlenecking on poor builds. It can improve power effeciency, and most of all, it's practical to use. We can already see powerful APUs coming in the future with AMD Navi thats predicted to be able to play 4k at 60 fps on incoming PS 5. There's no reason as why APU wont be a thing in the future. Sure discrete GPU might be more powerful than any APU for probably 5 years to come, but after that, maybe its time for APU to shine