The best argument you could make for the MacBook in this regard is for developers who might be working as nomads, and musicians who often lug their machines to their gigs.
But for someone doing heavy 3D, video, or gaming? I just don't see it. The M1 can't even run Tomb Raider above 30 fps. It's a 2 year old game, and isn't even that impressive. A GTX 1080 will yield 2x-3x that performance: https://www.anandtech.com/show/13400/intel-9th-gen-core-i9-9...
I'm just saying, they got a long way to go before that capture the hardcore gamer or 3D rendering market.
I know a videographer who worked for news wire services who did just this and did his job on a MacBook sometimes on site. Helped him deliver news content faster. I don't think video editing on a MBP directly is as rare as you might assume.
No doubt that Mac's haven't turnee into ideal gaming machines, but I've gamed on ultraportables with a lot less GPU than this, I just never played a game like Tomb Raider.
Apple is selling super quiet hypermobile performance here, I see them as occupying a niche with no real competition.