The Infinity Arm was developed originally by Sage Seb, a filmmaker who had Kickstarted the project in 2014 before then being acquired by Matthews.  It features a locking mechanism with rosette teeth for strength, but also a quick-release function for the head, which can come in differently-sized tips.  It can support a payload of up to 20lbs and will retail for around 300$.

The Dutti Dolly was developed by James Saldutti, a seasoned grip who wanted a lower-profile solution to production needs.  Machined out of a single piece of metal, it features a built-in Mitchell mount and several other accessory threads.  The Dutti Dolly's skate wheels can also ride on both round and right-angled track.  

No Film School's complete coverage of NAB 2016 is brought to you by My RØDE Reel, Shutterstock, and Blackmagic Design.

No Film School's complete coverage of NAB 2016 is brought to you by My R\u00d8DE Reel, Shutterstock, and Blackmagic Design.

More of No Film School's coverage from the NAB showroom floor:

The Dutti Dolly was quoted in the video at $1,400 but can be found for $1,189 at various retailers.