Re: iPad Mini Cellular
I don't have a phone but I do depend on my 10.6" Fusion5 tablet for exactly the same reasons. Usually use it in portrait mode but for the odd site (looking at you NextPlatform) landscape is perfect. Technically, if I've a useful WiFi nearby, I could conceivably make a phone call, although why would I?
I've recommended Apple to more than a few people who were best suited to their ecosystem. Despite a significant amount of money spend on Android apps, I can actually see buying an iPad Mini myself. Take a long while to save up the cash though.