I posted this a while ago.
If the idea of tubeless is to remove the weight / feel of the inner tube and prevent / minimise punctures but the downside is the faff, why not, have a very thin latex tube, with a profile similar to a tyre and pre filled with some sealant (think condom like tube complete with spaff).
The pre filled Johnny tube (as it will now be called) would have a regular valve and set up would be very simple. Inflating would fill and pressurise the void in the tyre / rim without the need for all the faff and paraphernalia of tubeless and without (i assume) the weight and feel of a standard tube. Punctures if they rip both tyre and tube could still be sealed by the spaff.
(steps back and awaits ridicule)