Agreed, This was one reason I was put off by Win8.
During Win10 Development and the new Insider Program, I imediatly signed up and mady my concerns noted.
Thats why 10 has in 'some' ways made it optional. Although For a Company as large and long standing as MS its surprising they cant get it right. That said, You physically cannot please everyone, but this is where Windows Customisable and more-than-one-way comes into play. However over recent times MS has culled both these aspects. As insiders reported more and more, they are slowly brining this back.
The most esilly noticable transformation is switching to tablet mode from the Notification Bar.
The Start Menu Turns into the Start Screen and buttons in Apps/Applications are 'supposed' to get bigger.
So yes, if this were to be an option, then an option would be much better than forced.
I like the idea of a second screen hehe.
Just to add a little with regard to my experience with An8 and touch, I was able to press the buttons fine on a 17" 4:3 1280x1024 Elo Com Port Touchscreen.
With my phone its a different matter (via VNC Remote Desktop), the main drawback here is the draw time lag and noit the interface, however soley focusing on interface, with the Pinch-Zoom being used for screen-zoom, I could enlarge the buttons to press them, however, this would take away from being able to do that in-model... Wait... it wouldnt, you can seperate the command into Pinch-zoom.GUI and Pinch-zoom.Workspace
Although, to be hones, at that point its probably better to just have bigger buttons that can maybe hide.
Trev