Red Hat is the closest we've got, but while they've sponsored great work at unifying the lower-levels of Linux via systemd, the desktop level is still severely lacking, not to mention the lack of a good, corporate-supported "reference" distro putting all those ideas in a coherent package. Sadly it doesn't seem to be a priority for them as they have the funding, manpower and influence to pull it off if they wanted to.
Once we get good and usable Linux on desktops for the masses, phones can catch up (and I'd argue they'd have an advantage here as they'd be able to reuse all that desktop-focused work and run Linux apps out-of-the-box).
What's holding Linux back is the lack of a coherent vision - everyone does their little thing in their own corner with their own vision and ideologies (which are sometimes contradictory), leading to a lot of wasted work and yields a subpar user experience since all those various components don't integrate 100%.