Been using this on my Macbook Pro M1 to play Breath of the Wild and Mario Kart using XBox controllers. My kids and I love it.
* Playing (Nintendo) games with the entire family (4 people, all holding a small controller): every Nintendo game is very thoughtfully designed to get 4 people through the "flow" before the game starts (pick your character, set the options etc.)
* Playing games in the portable/detached mode, it is a joy to hold and unlike a tablet you have physical controls. Most games are so much better than your average iPad game (or better said, the "match three" or mindless clicker games do not rise to the surface as easily as on iPad).
Then again I'm not buying the latest games or consoles, I've got some other ones that I dive into every now and then for a distraction.
Just about everything creates waste. Being into any hobby is expending energy in pursuit of leisure. You're opting into excess from the jump.
For this reason many games only run at 60fps in handheld mode.
Exact numbers are hard to give: native game resolution or native macbook resolution? Docked or undocked? Shaders cached or not? Graphics mods (some of which are efficiency/performance related) or not? Generally though most games run at native size at native speeds once you get everything going. BOTW/TOTK are some of the heavier ones though and, ignoring BOTW as I play that on CEMU, TOTK runs alright as long as you don't push it or expect high FPS mods.