I think the first step is to produce a GPU that integrates well with Intel CPUs. The next Metal version will need to have even deeper hardware integration while external GPUs support will be a solution for those who need AMD or NVIDIA solutions.
I got the XZ1 Compact. I love it. It's faster and smaller than iPhone X and doesn't overheat. USB-C with QuickCharge 3.0 takes 1h to get to 85% charge then battery last 2 days and 8h of screen usage.
It has backlight bleeding around the ambient light sensor. I can't replace it, but I can live with it.
GMSArena reported Sony is working on a Compact with 5-inch screen and 18:9 aspect ratio. This will be the perfect phone to own.