No, I'm not claiming everyone will switch to desktop machines for editing. Of course not. There are probably pros who use older hardware, and don't plan on upgrading until they really have to. Pro = person who makes money out of their work. Not everyone edits 4/8k videos of course.
Problem is that just MBP has TB. Not any other product has it. And even bigger problem is that 15" MBP comes with TB, and there is no version without it. What use does TB have to writers? Programmers?
Personally, I really hate TB. And unless I have to, I refuse to use MBP because of TB. I find it to be a complete gimmick, and just a distraction. Not just from my work, but also for regular stuff as well (sound, brightness, music controls, etc.). I can think of a lot of scenarios for function keys, and in every scenario that I use function keys, TB is slower, harder to use, and a distraction from what I'm doing at the moment.
And TB (with lousy keyboard quality) is the main reason I won't purchase any new MBP. Either Apple will ditch TB, or they will offer a nTB 15" MBP. Or they will stay on this course. If they continue on with just TB version, well, I will continue on using Lenovo for my mobile needs. And I know a lot of folks who feel the same. Funny thing is, I am in game development industry, and I still haven't met a graphic artists who likes TB