Best thing going with Firestick is when it's combined with an Amazon Prime membership - take advantage of a wide array of free content, plus purchase and rental options. We recently upgraded two TV's in home to Toshiba 4Ks with built in Fire capability - and loving them so far. May try to mount something like that in the rig when the cabin TV dies.
Now as far as usefulness while on the road - that remains to be seen. After our home upgrade, we have a "leftover" Firestick we plan to put into the RV. As others have said, you'll either need VERY good campground WiFi or carry your own hotspot with scads (that's the technical term) of data.
Can't wait for widespread 5G capability!
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