I'll put my wall of text here, because I can almost guarantee no one in the chat cared enough to read this much:
For me, a lot of it is up in the air with questions I must ask myself about what I want to do, how, when, and in what situations. I have a work laptop, and part of the issue I have with it is that it is just over that line of inconvenient to the point where, unless absolutely necessary, I want to head back to my office to check on anything that might need to be looked at. It can do the job, and it can do it relatively well, but I have always disliked laptop keyboards and trackpads. Plus, there's finding a place to put it down when you're out and about.
Which means, along with my options of chromebook, better laptop, and phone dock, there's also get a wireless keyboard/mouse that can easily be transported. The main intent is always convenience. It's just fully determining what works for you in your situation.
-Phone Dock: This would be nice because if you were in between buildings or something, or doing something directly from your phone because it would have been difficult to do so with a full device, then the phone dock would help you to at least pick up where you left off when you get back to your desk. I believe you can still easily make an answer calls with a bluetooth headset while docked, but I'd have to look a little deeper into that to confirm it. The only arguments might be battery longevity and actual usage/convenience. Not 100% certain on how the details work out for how long before you'd have to replace your battery. Usage and convenience might come into question because if you're already at your computer, why do you need a secondary (well, tertiary for me. Linux VM) one? The main answer to that might be the same one as to why I run a Linux VM: a lot of stuff can be more convenient from a different OS.
-Chromebook: Probably the most ideal for compromise and middle-of-the-road option. Lightweight and small, so it isn't too bad to carry around with you. However, Unlike the cell phone, it (generally) doesn't operate on LTE, only wifi. So, if you're without wifi, you're without luck unless you hook your phone up anyways. And, we run into the issues I addressed initially.
-Better Laptop: Not sure this would really resolve any of the issues I have, but I do worry about the power of a chromebook. I have a concern that it might not be able to handle what I'd like to throw at it.
-KB/Mouse: This is the main one I'm looking at. Really just hate having to use that shitty keyboard and mouse. This might make me more likely to use my laptop.
Overall, there's a lot of ways to look at it, and a lot of possible issues that could be addressed with most of these options. As far as I'm concerned, at least right now, it's a preference thing.