OP here; some of each, actually. The resolution does drop off at the edges, especially with more aggressive foveated rendering (which I turn off, so as to get as much clarity as possible). I do end up moving my head, but it's casual rather than quick, certainly not like darting around. The end result is improved ergonomics, too - used to be, with a fixed monitor my neck would become very tight and snap/crack horribly when stretching after a long session. The frequent movement in VR has completely eliminated that issue while working.