People in the Amazon Alexa ecosystem. This particular model has Amazon Alexa built-in which lets you control music and even your smart home devices with just your voice.
Anyone that wants a smart speaker that sounds good. Most smart speakers sound average at best, and the ones that actually sound good are huge. The Uxbridge Voice bridges that gap nicely offering good sound in a compact size.
People who already have another Marshall smart speaker. You can add this speaker to a group for multi-room audio.