I've used a few tablets over the last 3-4 years with varying degrees of success.
I had a Samsung Galaxy S3 for a while (top end Android Tablet) and found it to be fine with JPEG's but it wasn't particularly great for RAW edits, that said Lightroom CC Mobile looks better on Android now that it was back then.
Last year I picked up an iPad Pro 12.9 (Second Gen) and almost all of my editing switched to that, yes its a bit of a pain for file management and actually importing but Lightroom CC is good and Affinity Photo can all but replace Lightroom.
Currently iPad-less but using Windows 10 on a Surface Pro 6, its great but then its basically a laptop, I'll probably buy another iPad, its the best tablet for mobile editing.