I use mine for everything, pretty much. The computer is my media streaming, storage and back-up device, my phone is my away from the house, all-day device, (satnav, photography, reading, web stuff, streaming radio, phone…), and the pad is what gets used in place of the phone in the evenings, for all the web stuff, remote for controlling music playback, editing photos, reading…
Each one has its place at different times, and for different purposes, it’s so much easier to read the screen on the pad on sites like this, for example, and for properly looking at photos for cropping purposes or colour correction.
I could use the phone, but even with the big screen, I have to turn it to landscape to easily read the text on here, so I stick with the pad.
The screen is closer to a proper book for reading ebooks, too.
I honestly would be lost without it, although the IP 6+ would be a good substitute for a while, I still prefer the bigger screen for general use.
I can’t understand how someone could happily use a phone in preference to a pad for general web use and reading.