We built a consumer product like this back in 2013 - Autographer. The hard bits were i) battery life, ii) taking good pictures when moving, iii) having a socially acceptable & nicely designed product that points in the right direction, iv) connectivity, v) wide FOV camera module vi) How to subselect & create the best picture/video experiences (intelligence & creativity) vii) Who/when/what it was really for.

In 2017 v) is solved, i)/ii)/iv) are easier, google should be able to do vi) as well as anyone, let's see about vii). Anyway good luck to them and I'll be buying one.