From your perspective, with the tech you used, does it seem like there would be good commercial applications?

Probably, but we won't know until their capabilities are more fleshed out and innovation takes hold. As it stands now going from Point A to Point B is their most obvious commercial application.

But why can't that be real?(Legal issues aside) What about the theoretical Amazon Instant with same-hour drone delivery in certain areas?

kleinbl00 has a lot of good comments in this thread that I tend to generally agree with. There are many areas of the logistics involved that need to be figured out and drone technology still has a ways to go before they could be addressed. As it stands now I think they will remain heavily regulated in the same way that flying planes and using certain radio frequencies are. Drones are pretty safe to fly between 1,000 and 10,000 feet, but not if you have hundreds/thousands of them going this way and that way.

Even while going through Raven school in the states we had to stay in constant contact with the nearest airport's air traffic control tower and report it's 8 digit grid. We designated a specific area of operations and altitude that we could not exceed. It was potential trouble if we left that designated airspace. The same should be expected of any private entity flying drones that can exceed x altitude. This creates a need for an infrastructure that is not yet created and does pose safety risks by the sheer quantity that could be encountered -- our lessons in drone safety so far mostly relate to the individual flying operations of the drones themselves without much other air traffic in the area.