This article https://www.cultofmac.com/495208/homepo ... ore-495208 mentions this possibility as a negative--that there's no implementation of an App Store for HomePod.
But the idea is super intriguing, and certainly something Apple must be considering for HomePod OS 2.0.
The 32x32 LED matrix on the top is interesting news too.
So some brainstorming: What would Indigo Touch(less) for HomePod do?