Beyond using the TV to spy on you an attacker may just use it as a starting point into your private network to attack other devices containing more valuable information. Smart TVs fall into the IoT device category which includes a history of poorly secured and vulnerable devices. Some botnets, like Mirai, targeted IoT devices specifically due to their security reputation. Some TVs create their own wifi or Bluetooth network to enable file sharing or control from proximity devices. These can provide a bridge of sorts for a local attacker onto a network they shouldn’t have access to.