Re: fragmentation - astroturf script needs change
"A Windows 'universal app' is surely just what Android apps have always been,"
Indeed. But Android apps are roughly said, "Java applets on testosteron". Since Java is already universally compatible and quite easy to program, it must be quite easy to "port" Android apps to other platforms and probably explains the surge of Android apps. The proof is that Android today, comes in ARM- and Intel-compatible camps. And indeed most of these apps run on both platforms due to Android's Java heritage I guess. Only a handfull apps have separate Intel and ARM-variants (e.g. VLCplayer).
I reckon things will be more difficult when in the future Dalvik gets replaced with ART.