You can get something like a NexDock that has all of that built in. Just 1 cable.

Maybe I’m missing something, but how is this more convenient than a laptop? It has the form factor of one, so you’re already stuck carrying around what is basically a laptop. Wouldn’t a super cheap Chromebook or similar be more convenient since it’s a full desktop experience with all you’d expect from a desktop environment?

Anyway, working entirely on mobile is a thing these days, so if that works for you, keep doing what you’re doing. If all you need is a bigger browser, I’d also recommend a tablet with a detachable keyboard. If you want to keep the experience consistent between devices, honestly I’d suggest an iPhone and iPad (as much as I avoid Apple myself).