Your Apple TV and Swisscom TV Box can remain connected to the TV. The soundbar only needs the HDMI ARC connection to the TV to receive the sound from all devices.
If the soundbar is connected to the TV via HDMI ARC, the TV automatically forwards the sound from all connected devices (Apple TV, Swisscom TV Box and TV programme) to the soundbar. You do not need to connect these devices to the soundbar. The sound is then output via the soundbar as long as it is activated and the TV has been configured accordingly.
Yes, it is possible to use the device via Bluetooth only. The Sony HT-SF150 supports Bluetooth 4.2, which enables a wireless connection to compatible devices. However, there is also the option of connecting it to a TV via a cable, such as HDMI ARC.
Yes, both devices have an optical connection, I would use this connection right away. Suitable cable: Goobay Toslink cable with metal plugs (1.50 m, upper class, optical)
Depending on length ;)
I have an LG Smart TV 60" and it works perfectly. It has a glass connection, HDMI etc.. Bluetooth works very well via mobile phone etc. too. The effect is impressive compared to the "normal" speakers in the TV ;-)