I think that even if they managed to reduce emissions by even 5-15% it's already very good. Sure MS won't save a planet and it sure does help them sell those mouses, but if they contribute even a small bit, that's appreciated.
It's 2021 and it's crazy that people are still unaware of rechargeable batteries, which existed for a very long time.
It's a personal judgment. I find it interesting. Pretty much every new mouse is just black plastic clone of each other and this is gray, has some speckles and cyan accents. That's pretty cool. I'm still waiting for white SS mouse comeback, those looked super nice.