Horses for courses. It'll never replace paint because it's different. It won't replace custom paint either because people who spend decent dough on a custom vehicle won't want a wrap, they'll want fancy paint.
There is a paint guard for protecting new paint, it's clear and robust and a lot of prestige cars get it fitted to protect areas like the blue chin spoiler up there ^^^^^ but it's not a wrap as such.
Wraps are great for promotional stuff like the SKY vans. It protects the paint if done when the vans new and if it's fitted right you shouldn't get cut marks as mentioned. That said, there are plenty of vans that look like they've been wrapped by Edward Scissorhands.
The other problem with it at the moment is, like anything else, folk see it, think I can do that, get a job, make a mess of it and then that customer thinks wrapping is shit. I've got plenty of customers on their 20+ wrap who keep coming back so it works for some.
Car colour change is the next big thing if you listen to the manufacturers, but then they're in the business of selling materials. That said some of the new stuff is fantastic and for speed and vehicle down time won't be beaten by paint.
Chrome, matt black, carbon, pearl >
see here.