What will a streamer add?

[Music or sound]

I am also interested in a streamer/server (still find the nomenclature of such a device unclear). I would like something which does not require a home net work and/or external storage with associated cables. Obviously it needs to be connected to the internet and an iPad etc but wireless would be a better option (WLAN) not requiring a router to be plugged in.
One reason I am hesitant is that MQA could change music streaming (Tidal is one of the companies committed to it) and I have no idea how easy it can be implemented in present streamers only by firmware updates. I have not heard MQA and was reading very different evaluations about it. I am also wondering about Devialet's reaction to MQA!