I can see the appeal, but it's only going to be rewarding when there are more 'desktop' class applications using the new api (or some way is found to emulate the older api on arm - Wine on Windows?). I might be tempted if that were the case (the latter not the former).
At least the coming convergent Ubuntu phones will be able to run most if not all current linux desktop applications through xMir. Beyond that, they've got as much of an uphill struggle.
There's nothing wrong with a niche phone, I still use my nokia n900 (I'm used to the ridicule at this point).