Fluent Design is even pushing out a lot of "Enterprise" controls lately to bridge the gap in making sure that apps that want things like Fluent ribbons, traditional menu bars (why?) and dense scrolling datagrids (ugh, sigh, we will never be rid of the business pox of spreadsheets) have official options now (and at least some ability to fit in beside other Fluent Design controls).
Beyond that, traditional Win32 applications are allowed in the Store now (have been for some time), so S Mode isn't even limited to UWP anymore. Applications like iTunes are already in the Store, with better, more reliable install/update/uninstall now.
In hopes of attracting developers to Azure rather than AWS
You have bought way too much into the Microsoft PR. Microsoft does not love Linux, they just use it as a cash cow when it's convenient for them (in the server space, for Azure services) but that's the extent of it. Don't expect to see any real Microsoft offering like Office on any Linux distro.
Besides that have been improving UWP in every Windows release and are incrementally merging both worlds, as shown at a few BUILD 2018 sessions.
Next Windows 10 Office will be store only, also demoed at BUILD 2018.
Forget 2018. This processor is roughly equal to the A8x (think iPads from 2016) and I doubt it will handle normal Windows 10 well on the 4 GB / 64 GB configuration.
I'll be getting one.