There's a pretty big issue I've found when with using touch-screen PCs (tested on the new Surface Pro 2 running Windows 8.1).
A little background: In almost all applications (office, internet browser, PDF viewer, etc.) you can use your finger to scroll by dragging or sliding your finger across the page. This makes navigating a document easier than having to touch the tiny scroll bar on the right-hand side. If instead you want to work on editing the document, just "click" by tapping in one place and you're ready to type. Or alternatively use the pen. But using your finger to slide up and down the page normally scrolls up and down like usual.
This has support in every program I've used for Windows except Texstudio. In Texstudio however, it is strangely interpreting my finger as a pen and selecting text when I drag my finger across my document instead of scrolling. I imagine there should be a simple fix for this, as virtually every other program I've run on the desktop (especially document readers, word processors like Microsoft Word, etc.) has support for this.