Well – if your TV doesn’t do Atmos, then if fed an Atmos signal, you won’t hear anything.
I wouldn’t be too considered about whether the TV does this or not, unless you’ve got a sound system, because TV speakers won’t really let you hear the difference.
When you get the Vero, there’re options to enable passthrough for a number of audio formats. If you do not enable TrueHD passthrough, we will decode it and stream it as LPCM, which the TV will understand.
This should be OK. This is a bit of a read, but should advise you well: Audio hardware and software configuration