The new apple tv uses bluetooth connection for the remote. The reason the remote has a IR is so it can control tv's and amps that don't work with hdmi control.
I'd like to stick an IR emitter onto the Apple TV (2015) but I can't find the exact spot where the IR receiver is located.
If it's anything like the older models, the whole case is IR-transparent. Mounting the IR blaster anywhere above or in front of the ATV should work.