@wayland vs X11
There is still the issue of network transparency. While not really that important in out case (mobile/embedded application development), it still stands that it is something X11 has and Wayland is lacking so far.

Yes, this has been already discussed elsewhere quite heavily and yes, it should be possible to do it with Wayland using pixel scrapping.

But it still stands there is no such implementation in the current Wayland/Weston implementation.

Network transparency use-cases
From personal experience these work just fine on local (100 Mb Ethernet) network & are quite handy(as the application context stays on one machine, but the application can be used on many other machines):

• graphical terminal emulators
• Geany (wrote my bachelors thesis like this) and other editors
• Thunderbird
• Inkscape
• modRana