The progression of sizes of spindle disks should have solved this years ago, right when 1TB became "the" standard size for disks. Then things changed. SSDs came out and they were far superior, but their storage sizes were quite small in comparison. How long have they been around for now? You can get yourself a 500GB SATA SSD for under $100 USD, so still not quite good cost wise vs a 7200rpm disk. Then the situation where desktops stopped being the king of computers and was overtaken by notebooks, and to a greater degree, mobile systems. Microsoft seems to be following a model where Windows is generally the same across all of the platforms. And this makes sense if you consider that they didn't invent a new OS to run on low end mobile devices with low amounts of storage. They ported Windows over to fit into that space. So if cheap computers with small storage sizes make up the majority of the Windows platform, we can expect that any changes made to Windows are for those things. And since they don't seem to actually have a separate product for different devices, you are going to see those "features" show up in the desktop space. That is why your desktop computer running Windows 10 has a tablet mode and an airplane mode.
And it is quite interesting that they did not bother to segment those features obviously designed for the low end products so that... say.... Windows 10 Pro or Enterprise wouldn't have the same stuff as whatever they put on the Surface Pro. Especially considering the fact that Microsoft has tons of different SKUs for licensing where you have to use specific OS versions on various different devices. It seems that the licensing department knows more about the differences between computers than whoever is making development decisions.