Heh, a decent chunk of my work happens in Outlook, regrettably. Another good bit in the browser, accessing corporate stuff with the phone's per-app VPN.
So yeah it's sad, but I'd be able to write a lot with it.
But, to give you an example, tonight I went home carrying a laptop as this week I'm on call, and can only use a corporate device to reach our internal systems if something goes pear shaped. I often (weather permitting) bike to work and back, so a laptop is a significant annoyance to bring along.
That sounds about as productive as the never ending stream of “I tried switching to an iPad for dev” blogs