I was wondering how long it'd be before someone did this... The early stage involves minimal lift capability, but eventually 1000kg -- goods and people.
The MatterNet on FastCompany
Surprisingly "The team's prototype (pictured above) can already do this, but its autonomous capabilities have not yet been tested." -- I would think there are loads of hobby quads that are ahead of this one, then?
I've had dreams of doing this with rovers (of various sizes) of course the issue being the lack of roads...
Direct link: http://matternet.us/