The biggest use I see me getting out of Google Home from the get go, is being able to say "Ok Google" Add Milk to Grocery list. Ever since Google implemented commands with Keep I started using that and I think it will be very beneficial to me since I have to have a list when I go to the store. I always forget what I need when I get there
I am also looking forward to tell it to play something on my 2016 Vizio P65 with built in cast support
I hope to see more app developers start implementing OK G commands, or Google starts working with more. (not sure how that goes with apps)