^ Yeppers one of many things ChromeOs and Android enjoy gnu/nix never will(at least not as yet), hardware that's designed to work well with Google's offerings. With the sheer number of devices, esp Android anyone and everyone who isn't retarded is falling all over themselves to make a natively supported app. Plus the legions of developers flocking to freely contribute and create more apps for them, ah bunch of other junk. But seems it's a brave new world with tech like emulators and vm's, haven't as yet tried it but supposedly more than a few ways to run Android apps on gnu/Linux.
That's my dreamland perception of what gnu/Linux on mobile would be, a super streamlined nix install, specialized for the purpose with integrated emulation for using Android apps. Though of course it'll have to be minus the device support Google inc's stuff receives. Gnu/Linux on mobile will have to do the heavy lifting itself. No fully compatible, affordable and preinstalled hardware for gnu/nix mobile. Think it's another major barrier the platform has long suffered, users not only have to choose gnu/nix, they have to invest time-effort too. For a good chunk of tech-users and consumer electronics users, that's a bigtime deal breaker ... period. Given the ridiculous amount of users Android has now, oem's really have lesser to no motivation to even bother supporting gnu/linux.
Still given reasonable hardware support/performance think gnu/nix would be great on mobile anyway. Still no doubt ways to hack something together but with the size and scope of the open source communities surrounding ChromiumOs and Android not much reason to bother, even among us/those who feel nix is the best thing ever on desktop. In my uninformed and admittedly ignorant view would kind of like to see gnu/Linux focus on it's strong suit. Dominating the production/Enterprise areas of tech and expanding into desktop. Clearly one of the tech superpowers behind Google's explosive success, they readily get the device support gnu/Linux never has. Though in desktop that's changing somewhat and is bound to improve the more users gnu/nix attracts.
PS, Sunrats right, I talk/type too much, dayum ... Look at all that!

Oops ps2, Something else Google Inc's open source for fun n profit enjoys which gnu/nix doesn't, it's standardized and uniform, there's one gateway with the final word, yea or nay = Google Inc vs this fragmentation thing we keep hearing about in gnu/Linux, though think that's slated to change now too Redhat aka IBM, systemd, Wayland, pulseaudio, bunch of what they consider software chuff (or hobbist crap)being excised and left in the dust. Long established and disregarded best practices being enforced and open source projects, even major one's basically being told get up to this standard or go f-yaself. Hoping the end result will be overall positive. We'll see.
Really think it will, IBM didn't pour all those billions into buying Redhat for nothing. Between Google Inc and them, both maneuvering to rip M$ to pieces with open source. For fun and mostly for profit.