Yep you are right, I still believe film is the best thing out there to shoot a movie, and I hope it's still going to survive the digital era, because film is how cinema was born!
I can't help you pick a screen but I can tell you that I've been editing 4K footage on my Macbook Pro 15" Retina display. And I don't believe the Retina displays are 4K but more like 2.5K (someone right me if I'm wrong). But yeah, I have had ZERO problems with coloring/editing so far.