This would be great for an office commuter, bring it with you between home/work, but don't actually use it as a laptop

Why not buy two computers? Your boss will probably pay for both.

It's quite a pain to keep two computers in sync. You don't want to end up blocked on a task because you forgot to push your changes.

I'm also pretty sure that no company I have worked for would have paid for me to have two company computers.

I've been using Unison [1] to sync two and more computers for years. I can't recommend it enough.