My major concern will be battery life. Linux in general (Not Android) is still pretty rubbish on battery life.
It depends a lot on the hardware and the software optimizations. I have a three-year old Ivy Bridge Asus Laptop where (with tweaking), I get about 90% of the battery life on Linux that I get on Windows, and that's been my experience in general with modern (but not too modern) intel laptops. On the other hand with a brand new Surface Pro 4, I get about 60% of the battery life in Linux that I do in Windows
But that's to be expected: skylake only dropped three months ago, and with brand new hardware Linux never behaves as well because the kernel hasn't caught up yet. But Intel has made tremendous strides in power efficiency in general and on Linux in particular over the last few years. Much older intel hardware (pre sandybridge) still has poor CPU frequency scaling (and likely always will). But if you're in the sweet spot of hardware more than a year-old (so there's mature kernel support) but less than four (to take advantage of the modern intel cpu drivers), you can get pretty decent power management with modern kernels if you know how to do the optimizations (look into TLP if you haven't already).
So if they're running on well-supported hardware they might do very well, even with a full linux stack (much less their stripped down tablet OS). For reference, I get about 4 hours of active use battery life on average with full blown Arch Linux on my Surface Pro 4, which is not ideal for a tablet, but the kernels barely even support skylake at this point. I expect that will improve drastically over the next year or so, but for the moment battery life is the least of my worries (most of the subsystems still don't work, like the touchscreen or pen
).