On my Surface Pro I almost never go to the Desktop unless I need to do dev work or some arcane file management rituals. I barely even use Office on this device because OneNote satisfies most of what I need from my Surface (taking notes). I spend most of my time in IE11, Xbox Music, Mail (occasionally - doesn't work as well with Gmail as I'd like), Twitter, ReddHub (Reddit app), and OneNote.
As for my desktop, I do spend a bit more time on the Desktop, and I'm more likely to use Chrome, but I've found I spend most of my time using modern IE11 because it's a completely adequate browser. Some sites designed for Chrome have problems, and so I'll jump into Desktop Chrome for those. Obviously, I spend a lot of time developing on my desktop machine, but I'll jump into modern for things like Twitter.
I think the killer feature for modern applications on both the desktop and touch devices is that they are naturally responsive - apps are designed to adjust to the width of the screen they are snapped to, making multitasking usability much better. There are few desktop applications that work well resized to a quarter size of the screen, but most modern applications work great with that use case.
As for my desktop, I do spend a bit more time on the Desktop, and I'm more likely to use Chrome, but I've found I spend most of my time using modern IE11 because it's a completely adequate browser. Some sites designed for Chrome have problems, and so I'll jump into Desktop Chrome for those. Obviously, I spend a lot of time developing on my desktop machine, but I'll jump into modern for things like Twitter.
I think the killer feature for modern applications on both the desktop and touch devices is that they are naturally responsive - apps are designed to adjust to the width of the screen they are snapped to, making multitasking usability much better. There are few desktop applications that work well resized to a quarter size of the screen, but most modern applications work great with that use case.