Anything that reduces last mile shipping time. Drones route planning planning platforms, personnel allocation software, Smart fridges/locks. Big retailers are racing to <1 day shipping and buying fairly untested tools to try to get there.
Can you give an example of an untested tool you have in mind?
I'm mostly thinking of in home delivery for e-commerce. There was a company called Latch that was acquired that was more or less a smart lock for this purpose. You can see fairly regular news stories of Walmart/Amazon attempting this sort of thing. I believe amazon has some way to put items in the trunk of your car, but I don''t have a link handy.