Looking for advice on the best photo editing windows based laptop. Is 4k really worth it? How does it interface with Lightroom?
I'm sure there's no such thing as a "best" photo editing computer. There are some that will meet your needs and cost requirements well, and some that will not meet your needs and cost requirements well, but we don't know what your needs and cost requirements are.
The current versions of Lightroom (version 6.5 or version CC 2015.5) can work with 4K screens but require a realtively powerful graphics processor, see Adobe Lightroom GPU Troubleshooting and FAQ Is it worth it? Again, we can't really decide how much improvement you get from the 4K screen is worth the extra price for you.
Ok I guess I am looking for opinions on 4k display?