I recently saw this update from Vessi. Looks like it could be really useful for 1-3 gallon batches
https://www.getvessi.com/blogs/homebrewing-blog/homebrewing-with-120v-sous-vide-devices
I'm certainly intrigued, kitchy or not. I've been using a SV stick for small batch mashes and have had really good success so far. I think this is a cool first step in bringing some more innovation to the entry level market.