I'm with you on the $100 - but 4 months from now DJI will likely either barely - or not even - have caught up. For most of us there is little shooting during winter and Spring becomes a big buying season.
Heck, we are 19 months in on the Phantom 3 Pro and they are still selling to beat the band (although for less money). At some point soon the market of those crazies who buy every new machine as soon as it hits the street is going to run out and the market will be more utilitarian.
Example - a local guy who I just showed my birds to is a serious drone guy. But he was still flying his P2V+ until last week when he bought a
P4P. I assume he will keep that
P4P as long or longer than he did the
P2.
You can look at everything from ipads to laptops and even smart phones and see the same basic curve. Once a machine is "more than good enough" the party tends to mellow out. Many of these new Mavic buyers are first timers and "diy holdouts" finally lured in. But I don't see them buying every new model that hits the streets. Neither does DJI or the CES (CTA) who both anticipate a slowdown after 2017.