I just had an idea: What if the hypervisor framework prepares macOS to add a future compatibility layer to run apps on X64 and ARM. "Like" a new version of Rosetta (PowerPC on X86). But now maybe you can run iOS apps on macOS (you probably could do this with BitCode ?)
[1] http://www.theverge.com/2016/10/28/13454052/apple-macbook-pr...