Honestly I don't like Linux, FreeBSD, Windows.. etc where everything under the sun is stuffed into a privileged domain and is stagnating to the point where hardware common 10 years ago is just becoming useful w.r.t the kernel. I can only hope that something new will come along and simply multiplex the hardware and have abstractions as a 'library' without having to hack through n subsystems to add feature x.
Eventually finish working on a programming language that can facilitate this. Probably create something similar to MIT's old exokernel research project.
Ever since 2007/2008 GPUs and CPUs are converging, and it is inevitable that at a certain moment even some kernel computations are best left to the GPU.
Regarding security, these days, GPUs have memory isolation and protection. This is how the drivers work: they give a process its own memory-mapped command queue, and only permissions to use part of the GPU memory which they've allocated.
So although it does increase the attack service to GPU+CPU instead of just CPU, it is not a matter of 'simply stuffing everything into the privileged domain'.
