This gives an idea of the difficulty with a Pro. Maybe they will sell replacement batts already glued to the rear cover. http://www.ifixit.com/Guide/Microsoft+Surface+Pro+Battery+Replacement/19151
I found a YT video showing how to open one with a heat gun and some shims. Probably only a matter of time until a service depot offers battery replacement.
Are the driver updates from the 12th OK to install? I saw some discussion about the Bluetooth one. It is a gift and I would rather not have to troubleshoot on Christmas Eve.
In video editing, they suggest not using SSD drives for rendering due to heavy disk I/O (or plan on replacement). There should also be a life expectancy spec from the manufacturer for regular use cases. I am guessing at least 3-4 years.