I've used a 15" Retina Macbook Pro. The screen is not better. Sure, it's higher density and brighter, but the viewing angles are not better. Subjectively, I'd say the color reproduction is worse (I used them next to each other). Reflections, glare and fingerprints are significantly worse on the MBP.
I have a one year old MBP that I haven't used much; I'm not sure why, but the screens seem the same?
I do know one thing about most old laptops; they were made to last longer than 2 years.
That said--HP--as made crappy laptops for quite some time. I bought one a few years ago and it was horrid on an engineering basis, but it looked Slick.
Getting back to the original story, I don't think I've bought a desktop since 2003. I prefer using them, but laptops are just so convenient.
While a very fine machine in it's day, the screen, battery life, processing power, disk speed, size, and lack of heat on a modern machine like the 13" Retina MacBook Pro are on another level. You're talking about 7 years of evolution.