i do aerial filming and we recently already got this thechnology for gopro sized cameras, check this ultimate test: https://vimeo.com/60977570#at=0
a version for DSLRs is already being developed and should be out soon. The controller and IMU is developed by Alex Mos: http://www.simplebgc.com/ and costs no more than 110Euros, e.g. at http://flyduino.net/Alex-Mos-Brushless-Gimbal-BLG
I expect that the DSLR gimbal will not be more than $1500
here is another one where two different controllers are tested: https://www.youtube.com/watch?v=c8iwlrilpHQ - seems that these things are not that complicated, just someone had to have the idea
Looks pretty good...but will these other options A) hold up to 15 pounds with the same stability, and B) also allow for remote operator to pan/tilt with a well integrated system?
Home-built or low cost tools are great, and definitely should be encouraged and often turn out great work, but I hesitate to say they are usable for the majority of film makers, especially not for ones with any serious amount of budget. They will be attracted, in general, to very well made, very well supported
, and known and trusted tools. The Movi meets the first one, so far seems like it will meet the second, and with Vincent Laforet endorsing it, it has a very great start on the last point.