As a regular linux user should I switch to wayland from xorg? will I notice performance improvements?

Another question: I don't take advantage of X network transparency all the day every day, but it is very handy when it's needed. Will there be an equivalent in the Wayland (or, should I say, post-Xorg) world?

This is kind of a joke answer but the real answer is: This depends on the compositor you're using. So Wayland may not be network transparent, but it's possible to implement equivalent functionality on another layer of the stack.