During Build, Operating Systems exec Terry Myerson demonstrated how an iOS game could be easily ported to Windows 10.
During the demonstration, Myerson obtained an Xbox Live achievement, “How do you like them Apples?”, showing off the integration of Xbox APIs in Windows store apps.
We already have Xbox achievements on some Windows 8 and Windows Phone 8 games which count towards your Xbox gamerscore, a pool of all the points you’ve accrued playing Xbox branded games. Seeing an achievement pop-up on a very basic math game made some concerned that the Xbox API could become open for any developer to use, regardless of the quality or uniqueness of their game. There’s a lot of bad Flappy Bird clones in the store after all.