There is a difference between software that will run on a tablet, and software that is designed for tablets. Many of the PLC brands will probably allow you to install the software on windows 8.1 or 10, and some of them may even test it first. However, as far as I know, all of them expect you to use it with a keyboard and a mouse, like a normal PC, not with the touchscreen.
I've tried using a lot of standard desktop apps on a tablet style computer, and it usually just feels kludgy. On tablets you are used to gestures, things like swiping, pinch to zoom, etc. You use the on screen keyboard instead of a physical one, and you use your finger or a stylus instead of a mouse. Most desktop software includes little to none of these design ideas. Buttons are often too small to click with your finger. The onscreen keyboard often covers up the box you were trying to type into. Gestures do nothing.
I don't mean to discourage you, just take this as a caution. If you buy a tablet, and want to use standard windows programs on it, I would recommend trying the program for a bit on a tablet before relying on it. When I got mine, it didn't turn out quite as awesome as I imagined it would.