DIY Handheld AI Chatbot runs on a Raspberry Pi 2 Zero, and costs around $120 to make
(www.yankodesign.com)
Then, from my perspective, there's little to no value to have a dedicated piece of hardware for it. At least I'd guess that 99.999% the target audience for such a thing already has a smartphone with them. What - if not for the sake of privacy - is the added value of a special chatbot device?