There are use cases where I expect M1 machines to do well, and bring actual improvements to end users: for instance, I have no problem believin their power consumption figures are excellent and that translates to 20 real hours of usage. And even midrange performance can be enough when the scenario involves browsing, email and personal productivity (e.g. Office / Google Docs).
Gaming on the other hand will likely be another blood bath, as Intel has just cracked it with their new Iris Xe integrated graphics. I'm ready to bet all M1 GPU comparisons were made against some 8th-gen Intel CPU with HD 600 graphics. Obviously that will be no challenge for a real graphics card.
Sure, I mean ARM machines are already known for their power efficiency so M1 not consuming as much power as a normal x86 CPU will come as no surprise, plus their 5nm technology should also help with that