My daily driver is a Hackintosh and with the CPUs pegged pulls about 70W from the wall. The two displays add another 90W.
M1 is impressively efficient but there's still a gap for fast, no-compromise workstations.
But on a laptop, it matters a ton. Personally I prefer doing work from my couch rather than my desk; ergonomics and external monitors be damned.
Around 40 years old is usually when you start to pay for carelessness with your body. Ask me how I know ...
Apple has already said that they are releasing a workstation-class M1X/M2 next year.
The point is that the M1 is already comparable to many workstations.