Once again RPP, I agree 100%. The
P4P does indeed have a pretty decent lens on it and that was one of the things that impressed me immediately.
As far as a next Phantom, if there is one and I think there will be, I suspect the next one will be the last as the body design is a bit dated so if there is a P5 it may well be the last of the line. Going forward I think a newer design that's perhaps a bit more compact and possibly fold-able will eventually replace the Phantom line. I don't know that the Mavic body is it as I suspect the successor will likely be a bit bigger than the Mavic line to permit a larger battery that could be needed to handle the greater energy budget to handle the image processing for, say, 150Mbps and true 4K60. My suspicion is that the current Mavic line is just not big enough to handle the increased image processing workload.
I could see a scaled up Mavic like drone that will be fold-able, bigger and with a larger battery sufficient to handle the larger drone and the increased image processing workload while maintaining a flight time upwards of 30 minutes. The current Phantom line has been around for a long time and the landing gear in particular is the biggest negative -- a next version should address this particularly to limit the props being in the FOV. The upside to the Phantom body design is that the shape of the body probably provides a decent amount of lift with modest forward motion so any new design should endeavor to provide additional lift while moving. I know that the flight times are higher while moving than standing still.
Brian