Ah.. but I thought remote access was a niche application, no longer relevant enough for developers to care about?
That's a bit much. I suspect what you are hearing is that Network Transparency is a niche application.... Remote access while vastly less important than it was 20 years ago is still used. Which is why Wayland supports it and supports it better than X11. This is what I keep saying you cannot confuse remote access which is far better with Wayland and X11's specific methods of remote access. BTW we know KDE and Gnome are going to support remote because they have been working with Wayland already.
I use Stumpwm along with the pager from Lxde.
LXDE is in the process of becoming LXQt. It fully intends to support remote using Qt's system. As per the June 2013 announcement Hong Jen Yee (PCMAn) is waiting on the freedesktop guys to tell him the messy details are worked out, right now they've told him what not to use in Qt 5 if he wants to easily be on Wayland and along with Razor they are making sure that LXQt doesn't use that stuff some of which is being backported to LXDE. I suspect that LXDE will never be native Wayland. I do know they are ripping out X11 dependencies from the LXDE codebase to make such a port easier if they choose to go all the way but they don't intend to.
However getting to your use case: LXDE right now works beautifully with SOC configurations. That's why it is exist. So the kind of lighweight dumb system you are asking for now that you want it for LXDE become much easier. These are sold all over Asia using LXDE based distributions and they are cheap (generally under $200, often like $125). I'm not sure if they include additional languages or even test against English but even if this is not a "just go out and buy this" it certainly is a proof of concept. So there you go: If you want to use LXDE you will have terrific support and get an upgrade.
As far as Stumpwm none of the X11 windows managers will work with Wayland. Window management for most is a rewrite from scratch. You can use Stumpwm for X11 on Wayland of course. However Stump isn't really a window manager as much as a programming exercise demonstrating how to do windows management in LISP. So in theory you got lucky while someone is going to have to port it to Wayland, it very well might be pretty easy. However to complicate this under Wayland the display server, window manager and compositor are complied into one process there is no abstraction like there is in X11. So Stumpwm while getting to run native on Wayland is easy to do anything useful with it it is going to need to be hard paired with a display server and compositor. I don't see any evidence that Stump will go there. So let's assume Stumpwm as an end user product is gone even if it still exists as a teaching tool.
Moreover I'm not sure the culture is going to allow you to be able to just casually change window managers under Wayland. For example LXQt will only be tested against its own compositor which will be tuned to LXQt. You can run other applications but when you run LXQt (again the version of LXDE that will exist on Wayland) you have picked your GUI.
This BTW is where you get huge advantages. You LXDE top to bottom can be compiled for the SOC hardware (the way Android works today) so you will see huge increases in battery life and much better performance.
By texting I mean SMS. You have something that lets you do that from your computer?
Yes. There are many solutions. Apple's built in Messages application does this. http://mightytext.net/ works for Android.
Why keep upping the hardware requirements when we have a working solution already? Aren't the landfills full enough?
We don't have a working solution already. X11 doesn't work. New OSes / features up hardware requirements. That's the norm.
But i'm not even sure you are being environmentally sound. Even on the kind of crappy hardware you are probably burning about 3GB / hr of network for remote X usage assuming this is all wired (wireless is more) or about $.03/hr in electricity over a WAN (wired LAN is close to 0). Or about $.25 / day ~ $50 / yr. The landfill is less environmentally destructive than all the electricity you are using by consuming all that extra bandwidth to have everything sent to you post processed instead of storing the bulk locally and just getting instructions.