How often do you put a wireless mouse or keyboard somewhere you wouldn't also put a wired mouse or keyboard? It seems to me the ergonomics are likely to be the same for most cases.
Fair enough if you think wireless is advantageous in this case but I personally don't. Or if it is, it doesn't outweigh the disadvantage of having a mouse that can run out of juice.
...except for the main advantage, which is the wireless setup's entire reason for existence?