I haven't (yet) felt the need for a tablet. I use my phone when I am out wandering - and I suspect that I wouldn't carry a tablet with me.
I have a Kindle for reading - but when I am out and have a need to read I use the Kindle app on my phone.
I do have an early edition Microsoft Surface with Type Cover (running Windows 10) that goes with me when I travel. I can almost see using a tablet for travel but I would be unhappy without a keyboard since I usually write blog entries from the road.