Low energy beacons is a worthy candidate to be explored, but then again even if it is miniaturised, cost-effective; the action of placing them in our things needs to be repeated and that's the friction a camera based setup can avoid completely although with questionable feasibility.
I'm quite sure that there are startups out there building Amazon Go like setup to be offered to supermarkets as a turnkey solution, question is whether it can be adopted to consumer homes to help solve this problem.