Those would work. I have an sp2, biggest issue I found was how to control it. Pen input sends most games spinning. Civ5 actually worked rather well as they updated the game to support touch, so if you start it in that mode you can do the whole game without having to use something else for input. No idea how well that runs on bay trail though.
Bay trail platforms need more memory that is not currently supported last I checked. Otherwise, one will find the need to close any desktop applications except the game, and to have Modern apps to auto suspend and sleep or be manually closed.
The beauty of the Surface Pro 2 (and other like minded device hybrids) is the USB port. If touch or pen is not as ideal (some cases it isn't anyways) then a traditional pointing device is but a plug and play away for most devices.
In my case, a Logitech unifying receiver for the M570 is always parked for trackball pointing. It is perfect in anywhere gaming and computing alongside the hybrid that is the Surface Pro 2 because there is no need for a flat area to slide things around. Some cases, I might pull out an Xbox 360 controller. I wish there is a Xbox controller cradle, but that is asking a bit much for little market demand.
But I thought about it some more and figured Starcraft 2 of all things would be best if converted for a touch PC device. The menus are driven to be in a touch friendly manner anyways in terms of unit control. Touch, eliminates the time for mouse drag, enabling even more reaction and action time to the field in augmenting tactics. Multitouch fingering would give you more than just left and right click, but a middle click and perhaps a fourth and fifth mouse button mapping.
Most games do not recognize the pen hover, pen input, or touch correctly due to not implementing the additional exceptions of API for the pen or touch. But what do you expect for software that was not specifically designed to take advantage of future input options when it was released?
As far as the OP is concerned, and anyone else for that matter, looking into a full Windows 8.1 tablet/hybrid then for desktop navigation (hence why you are looking into the full Windows 8.1 to begin with) I will say this again...
Google or search for TouchMousePointer, install it, and navigate happlily on your touchscreen (now doubling as a fine laptop trackpad). Make sure it is running on full screen mode, hiding any UI elements and allowing you to fully see the desktop. Settings allow for a two button and scroll wheel + button mouse input.
TouchMousePointer, will make your desktop experience on smaller full Windows 8 devices much better. Your brain will have to adjust to the duality between Modern and Desktop still however, but work that mind!