I recently upgraded from Vista to Windows 8 and, having done so, I was rather surprised to see Deseret Alphabet text showing up correctly. It turns out that the Segoe UI Symbol font has a complete set of Deseret Alphabet letters (but not Shavian, strangely enough). And they look pretty good, too. Given the close connection between Windows 8 and the OS on Microsoft's Surface tablet, I imagine the same would be true there. I don't know what the situation is on Android, but I know that iOS doesn't ship with a DA font. That means, it would seem, that the Surface may very well be the first tablet to ship with a Deseret Alphabet font.