A little late to the game, but I thought i would toss my 2 cents worth in and see what happens.
For the last 10 months since getting my x-carve i have been using an RPi2 for my controller with grblweb first i was going through my tablet to setup and control it wirelessly, then we received a free chromebook and i love having that in the shop! No moving parts, no touch screen to get all scratched up and it ran grblweb wirelessly very well. Having the hotkeys for jogging is immensely helpful! That said, I am soon expecting my upgrade kit and was looking for how I could use the z-probe and it seems it works natively with easel. Grblweb and chrome gcode sender do not offer any probe use that i can see, so that part of the upgrade would almost be useless, i would have to bring my bulky laptop for gaming to the dirty shop again to run with it in any meaningful way. The easiest way would be if i could just use easel with the chromebook, my investment in the RPi would be defunct until i find another use for it, but that will happen either way i do things. So sign me up for a chromebook plugin/driver/app for easel please!