I'm getting back into it, but a quick look at https://www.tonymacx86.com/forums/sierra-laptop-guides.189/?... tells me that it's still pretty early for 4k hackintosh laptops. Looks like the one I got was one of the first ones.

If I had unlimited funds, I would probably just build a desktop, since they have a really good monthly recap of what hardware works with the current software. https://www.tonymacx86.com/buyersguide/april/2017

I guess that's sort of where the line is drawn is you can't really "build" a laptop. Seems like there are a few good Dell models that chose hardware that works with mac, though. I'm sure in the near future we'll start seeing more 4k capable hackintosh laptops.