You really don't lose any functionality. the DA App can access your DVR, your Program guide, On Demand and all the apps that are on the Hopper can be downloaded onto the Firestick. The only thing is you can only stream DA one at a time, so if someone is using the Firestick to watch Dish Anywhere, no one else can at the same timeThanks for the clarification on the wired/wireless joeys. And also for the info about activating/deactivating a Joey.
I spent a couple of hours last night educating myself about all things firestick and about the Dish app. Looks like a Firestick 4k paired with the app would reasonable solution in the spare bedroom. Cheaper than a wired J3 - $25 vs $70. What functionality would I lose if I opt for the Firestick? Would guests still be able to play back content recorded on the H3?