I mean, if someone said, "I've successfully ported Vim to Android!", my first thought would be, "Why in god's name would I want to run vim on my phone?"*
* Ruling out, of course, someone plugging their phone into external KVM.
While I agree that it can be difficult to design information-dense UIs for small displays or provide navigability to a large feature set, I strongly applaud efforts to unify computing and work through these challenges.
I very much want all of my computing devices to be unified. In fact, I want a model where I have one computing device and multiple views ("terminals" if you wish) [1]. But a consistent experience as Purism is pitching, and which Microsoft attempted with Windows 8 + Windows Phone 8, are viable first steps. There is learning to do here and it's great to see people taking on the challenge.
> I mean, if someone said, "I've successfully ported Vim to Android!", my first thought would be, "Why in god's name would I want to run vim on my phone?"
Sure, but if they find it useful, fun, or just plain cool, I applaud it. I want more desktop-class computing capabilities on my phone-sized device and I routinely find myself deferring important actions until I can get in front of a "real computer." Many things are just too challenging or limited on today's mobile operating systems. Even with "convergence," as Purism calls it, there will still be cases where I simply want to use a larger screen, so I'll defer until I can dock the device and use some large form-factor I/O devices. But with the stance Purism is taking, I would no longer experience the frustration of software limiting me even when I am willing to endure the limitations of my hardware.
"Convergence" is a pipe dream because of the differing and mutually exclusive expectations of those different user types, and "one size fits all" programming ends up underserving both segments. The only thing I would change is that mobile needs to do more to expose users to internals (things like access to the proper file manager), rather than hiding and abstracting away every detail that might confuse grandma.
On the other hand, I like the idea of at least being able to run software on all devices and them at least being usable, even with a shitty interface (like having to scroll through numbers on a desktop, Microsoft). This way I can still use familiar tools for non-recurring tasks. Like RDP on a phone might not be fun, but gets the job done.