I've worn glasses for my entire life, so my personal dream setup would be replacing my laptop, monitor, and phone all at once by replacing my prescription lenses with augmented-reality glasses that annotate the world around me without blocking it out entirely.
I do not wear glasses but long-time readers of my blog may remember that I too would like to replace all of the screens in my life for an augmented reality experience. I'd want them to provide me any screen size I need at any time any where.
When I personally look at how I use my full monitor desk set up, my laptop, my iPad, and my iPhone; I am generally just changing the size of the screen between contexts. Mixed reality (MR) could provide me a way to have any screen I need at any time and thus only have a single device. We're likely a long way off on this - mostly because all of the companies seem to be focused on the lucrative gaming market.
I haven't written about mixed reality on my blog in a while. I believe my timeline for such things still stands. As does my observations on the industry as a whole. But it may be time to revisit MR and see what the latest is.