Well, can't completely agree to this:
I had installation "problems" only with my first 4K, since it was described nowhere that it had to be connected mandatory to the HMDI-port #1. That took me a lot of time to find that out. Then, adjusting the IPD via software was a bit of trial & error, but worked well in the end.
My second 4K then was - due to my experiences - more or less simple plug&play.
So, yes, might be, that the Vive behaves a bit more comfortable there. But remembering my trials with the Rift DV2 and CV1, first start-up also took up to 10-15 minutes including live download and installation of that huge driver and software I never needed to that extent.
So, 4K-startup could have been a bit more comfortable especially concerning that HDMI-port-aspect - but apart from this, no major problems at all.
Therefore, I don't expect the 8K to be any worse in this context, but in the contrary, to be more or less simple plug&play. Then adjusting once IPD, either via handwheel or via software (as early adopter/backer/receiver, I could live with both solutions since I am the only one using it), adjusting a couple of other things, once -, and then, run SteamVR and let the fun begin Pimax certainly will have learned a couple of things in the past years, and the 4K-software already now is a lot better than it formerly was.
@Gaming without controllers:
I disagree completely here since it depends on what you are playing:
I'm playing only cockpit simulations and RPG's - so I have all the controllers I need already connected: Keyboard, mouse, joystick, wheel, shifter. Yes, of course, meanwhile I'd like to have some VR-controllers, too, for a couple of games such as Apollo 11 VR, GoogleEarth VR, Spacetours VR or Ocean Rift which do require them. But there are quite a lot of games for VR or adapted for VR which do work with "standard PC input controllers".
So, I don't think one can say that the 4K is useless for gaming without native VR-controllers. Absolutely wrong here.
Of course, display panel alone is not the whole story.
But already with its display panel, the 4K does behave quite a lot better in this context than top dogs such as the Rift or the Vive do - for gaming, depending on the games. From my point of view, for cockpit sim's and RPG's, the 4K is far better than any Rift or Vive at the moment, although it is certainly still far from being perfect, without any doubt.
That's why I am waiting so impatiently for the 8K to be shipped