I'm writing today using my Droid Turbo phone. As you might expect, the keyboard is smaller and not as easy to type on, but it partially makes up for the limitations with spelling assistance built-in and also the ability to provide a few useful word suggestions for some common phrases.
I'm finding fewer reasons for always being on a computer. I'm sitting in a recliner chair with a power source connected to the phone and a wireless network connection to make the connection.
To be honest with you, this phone is faster than at least half of the computer systems in the house, definitely the ones over a year old.
What are your experiences using phones or tablets in place of computer systems for some of your correspondence?