The Z-Cam looks cool. But our recent history is littered with non-starters and vaporware. I agree with NorBro, once B&H has them on the shelf...
Unlike CraftCamera with Z Cam they have an actual history of shipping out and delivering on many cameras already. I'd say Z Cam is no great deal riskier than say waiting for the BMPCC4K with its 4K 60p