I've owned various tablets over the years, but 9/10 I'll reach for my phone first.
Whether sat at home on the sofa, or in the office, or in a coffee shop - the phone is just more convenient.
My view of the future is one where my phone is the only device I need. Plug it into a dock, it becomes my "PC" replacement. Want to play a movie or a game, 'cast it to the TV or console for a larger screen.
We are a long way from this, especially if I want to write code on it. So for now I'm sticking with the phone/laptop combo. Not sure I need a tablet anymore, unless it is part of the laptop configuration like a Surface device.
Although saying all that, until screen technology improves. I'll stick with my Kindle Paperwhite for reading books.