I'm often multi-tasking on my laptop, etc. So a bigger screen has value for comfortably putting windows side by side and quickly switching between windows. Anything longer than perhaps a 1/2 hour on a tiny device is longer than I prefer. When I do design work with clients, a bigger screen is also very valuable-- I can share ideas and draw on the screen, and we share the real estate. I also vastly prefer a dedicated keyboard when typing on my lap or in my truck- again, because of the mobile nature of my work. There are a host of reasons to have a bigger screen and attached keyboard, for my mobile, keyboard heavy use case. Of course, what's also fascinating is how much I use my iPhone SE to do work on the fly, in my truck, etc. But I type very little and do little real multi-tasking on my phone, and instead use voice dictation for small emails, Dropbox for assessing documents and bids typed on my laptop, making an appointment on my calendar app, dropping a todo into OneNote, etc. Those sorts of things are perfect on a hand held tiny device. I actually think a laptop is a bit of overkill sometimes for those things. But for drawing or typing or multi-tasking, a 10" device hasn't really been big enough for me. Also, I use my laptop as my primary personal multi-media device, so a big screen is nice for that too.