Smart speakers
There is a family of devices that are self-suficient.
You (usually) do not need any additional device to make those devices stream music directly from the internet.
They have some unique attributes in comparison to classic speakers:
- they do not require any analog cables
- they do not require any AVR
- they do not need any additional device to play music from the Internet
Recently both Apple HomePod and Amazon Echo can be used as a soundbar using eARC connection in theater mode.