There are probably millions of soon to be unsupported devices, N900 (already left behind), N9 and N950 that could conceivably run this. After all, N900 can run open office and it is the oldest of these devices.
It would be much easier to test and contribute if one had a device already to properly experiment with. My N900 is gathering dust and there is no good replacements for its OS.
In terms of getting 'official' support (meaning Mozilla employees working on it for real, I guess), I don't know how likely that is. But that said, it's all actually open, and porting it to other devices is not just ok, but encouraged -- I don't know about anyone else, but I'd love to see this running on other devices, and have some plans for some personal projects along those lines myself, when I have some spare time.
There are probably millions of soon to be unsupported devices, N900 (already left behind), N9 and N950 that could conceivably run this. After all, N900 can run open office and it is the oldest of these devices.
It would be much easier to test and contribute if one had a device already to properly experiment with. My N900 is gathering dust and there is no good replacements for its OS.