I find tablets to have more of a use than a smartwatch. I work on cars...oil changes, tires, etc. There is not a week that goes by that I don't have a scratch or scrape on either wrist. When I got a Moto 360, I would wear it to work, but take it off after I changed into my uniform. After a while, it got to the point where I was leaving it at home.
I think if I could do it all over, I'd go with a pebble. It can last longer per charge, and it's much cheaper, so if there was a point where it gets damaged, it's a lot less money at risk.
Tablets....I'm not sure about their future. Consider the convertible Chromebook that may come out in the next year. That should be able to run Android apps, and double as a laptop. I honestly think that is where a larger device shopper should look. It being Chrome OS, it will get supported for quite some time, so there is not much of a worry about updates.