Iterating instead of throwing out everything with each new version. There is a part of me that is going to miss the, do weird shit and see what works, Nintendo that brought us some really fun ideas. But a stable Nintendo just being able to continue putting out great games has its advantages.
I am curious about the specs, but honestly don't care much. The only real issue the Switch had was being able to keep up with some of the games put on it with FPS but it still had beautiful games (like Tears of the Kingdom). So as long as it is actually a decent spec bump I am happy and have zero care to compare it to the other consoles (but I am sure people are going too and scream that it is "underpowered").
The biggest thing I am curious about, will it be OLED since that will be disappointing to go back to non OLED from the OLED Switch. And Price.