Additional information:
If you are considering a Roku Express, I would concur with @StreamerUser's suggestion of getting the relatively new Express 4K+, for both reasons he cites (point anywhere remote which would allow placement behind the TV, and dual band WiFi). In addition this gives you 4K capability should you upgrade to a 4K TV in the future, but will work fine with a HD set today.
The HDMI extender with the Streaming Stick+ would not be needed with the Express because the Express connects to the TV via an HDMI cable, not via a built-in male HDMI plug like the Stick.
The Express is a bit bulkier than the Stick, so if space is super tight behind your wall mounted TV, there may not be room for the Express. Also if the Stick is already set up on the wall mounted TV, you may just find it easier to leave it in place and put the Express on the other set where you've got more room to work.
The Streaming Stick+ is claimed to have more powerful WiFi capabilities than other Roku models (other than the Ultra). I don't know if the new Express 4K+ has this enhanced WiFi, so you may find that the Stick+ gives you better WiFi performance in whichever location is further from your WiFi router.
Roku Community Streaming Expert
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Streaming Stick 4K+ 3821 | Streaming Stick+ 3810 | TCL Roku TV 43S245/C107X
