Re: As an MBP owner...
Well, as a non MBP owner, I'd pay a few hundred extra for a 2880x1800 resolution screen on my laptop, but only Apple offers that. Or for that kind of resolution on the 27" monitor I have instead of the 1920x1080 it has. There are some 2560x1600 monitors out there, but they cost nearly $1000 versus under $300 for the same size in 1080p. Clearer more easily readable text is a good thing, and I'm willing to pay for it. Apple's sales of the Retina MBP shows I'm not alone in this.
Laptops and desktop monitors are far more in need of resolution increases than TVs and phones. Yet all we hear about are pointless hype about 4K TVs and 1080p phones that serve no purpose. I'm not hearing anything from anyone about higher resolution laptop screens aside from Apple, and even 1600p desktop monitors cost 3-4x what the same size panel in 1080p costs. Stupid. At least 4K TVs will have the side benefit of eventually making 4K resolution desktop monitors reasonably priced!