You will soon be able to control your 4K HDR Sony TV with an Amazon Echo. Sony has announced today that a new firmware update is going to be released later this month which will bring Amazon Echo compatibility to select TV models. The press release states that users with an Amazon Echo, Echo Show, and Echo Dot will be able to control the TVs. This suggests that perhaps this functionality may not be available on other Alexa-enabled devices.

Source: 4K HDR Sony TVs Get Amazon Echo Support | Ubergizmo