The Surface Pro X certainly looks nice, but many currently available apps in the Microsoft Store do not work with the adjusted 64-bit ARM processor of the SQ1 – and strangely enough, my colleague Dieter Bohn found that the Microsoft Store will not stop you from buying apps that don't work. So in theory you could pay for an app and download it, only to discover that it is not compatible with your shiny new computer. Frustrating to say the least.
Microsoft promised that it would solve that problem, and it has – sort of – an update to the Microsoft Store app, according to Windows Central. If you use the updated app on Windows 10 with an ARM device, it will now apparently hide some incompatible apps and games for browsing or searching if they don't work on your computer.
However, it seems that some games that don't work still appear – Windows Central said Grand Theft Auto San Andreas can still be purchased and Guacamelee! 2 appeared in a search query – so Microsoft may still have some work to do in the app, so you don't accidentally download something that you can't use.