I doubt the need to go to 2070 or more. Here's why. The usual screen is all of 15 or maybe 17 inches so 1080p is fine there. Games run well even at 1440p 144Hz on the (old?) 1070 and we have another issue is that the full power 2070/2080 generates a lot more heat so the 2070/2080 in laptops is clocked slower and doesn't compare well to the desktop GPU.

This area is still developing so if you can delay, you should.