The point is that it can always have whatever music is available on the network or with the apps present. Also, instead of having to be within 20 ft of the speaker, you just need to be in wifi range within a home/house. Along with that, multiple phones can join at a time, change the volume, sound, or the playlist. One of my biggest differences is that people can leave and it will still play. Your phone isn't constantly being drained because it's streaming something.
I guess the point is, it's not meant to be a portable speaker system. It's meant to be a very convenient home music system. Btw, with the sonos system, you can set up multiple speakers in different locations, have them synced together, or playing different music, all at the touch of yours/anyone else's phone.
As for Anker entering this field; I don't know. I see them as more of a hardware company; and not so much of home network server company.