From page 3, "Some Misconceptions about X and Wayland":

    II) “X is Network Transparent.” Wrong. Its not. Core X and DRI-1 were
    network transparent. No one uses either one. Shared-Memory, DRI-2 and
    DRI-3000 are NOT network transparent, they do NOT work over the
    network. Modern day X comes down to synchronous, poorly done VNC. If
    it was poorly done, async, VNC then maybe we could make it work. But
    its not. Xlib is synchronous (and the movement to XCB is a slow one)
    which makes networking a NIGHTMARE.

And later:

    V) “Wayland can't do remoting.” Wrong. Wayland should be BETTER than X
    at remoting, partially do  its [sic] asynchronous-by-design nature. Wayland
    remoting will probably look a like a higher-performance version of
    VNC, a prototype already exists. And this is without us even giving it
    serious thought about how to make it better. We could probably do
    better if we tried.

So, Wayland will implement remoting in a way similar to VNC, which will be an improvement over the current state of things in X anyway.