Does the tablet have with (or support) a stylus for the touch screen?
If not and you have to use your fingers, it may get uncomfortable after an hour or two.
(There's a lot more stress involved in using fingers directly than with a stylus or for that matter standard mouse and keyboard)
Basically, a new tablet is a lot like an underpowered notebook with a tiny monitor that's a touchscreen and doesn't come with mouse or keyboard. You'd have to check to see if has USB ports to support those. (But if you wouldn't have space for a normal size notebook, you probably don't have space for a separate mouse or keyboard anyway.)
By now the underpowered by todays standards will be pretty much what average was back when Civ V first came out.