It's not about phones but laptop- and tablet devices. I for one are looking forward to an affordable, reasonably powerful ARM based laptop on which I can run openSUSE. But it's highly likely that those won't come to exist as the ones which get mass-produced are Windows only... In the PC world you can simply wipe windows and have your nice device, the only downsides being the Microsoft tax and possibly hardware support issues. In the ARM world - you're out of luck.