Einspanner said:
This is just a marketing stunt, for a very good technology. This isn't really going to be marketed primarily to hobbyists, but to companies that need to move dense freight in warehouses and that kind of thing. Coat your warehouse floor, and all of your lifts no longer need a giant machine to drive them around, or training to use. Much safer too. You'd only need forklifts for stacking, so you'd probably use a roof-mounted device instead. Safer, more efficient, no internal combustion engine, few moving parts, relatively cheap compared to heavy moving equipment, and that's pretty much where they're going with this.
I think you are overestimating the tech. Capacity vs battery life is going to be a killer to use this in an industrial capacity. Let alone what happens when it fails. Or potential safety risks of electrically conductive floors in a lot of industrial environments.
Forklifts have the advantage of most kinds of failure not dropping the freight, having a comparatively high capacity vs power requirements, and being comparatively cheap to repair if you have a decent mechanic (mostly because failures tend not to damage load bearing parts).
Safer can be resolved by training people properly to run a forklift.
I disagree wildly about efficiency (hint: they never seem to do any long duration demos of these things, or show load capacity, for a reason).
Electric forklifts exist (and have very large, very heavy batteries to supply enough juice for usage, the kinds of batteries your "hover pallet" is going to need to also be carrying to run the hundred+ "hover engines" needed to supply the kind of lift you get from a small forklift for anything resembling a usable duration -- if there's any lift in excess of the weight the batteries would take up for an 8+ hour usage).
Moving parts involve a motor spinning an axle for each "hover engine" as well as several actuators of some variety per "hover engine" if you want it to be steerable.
Price is another thing I'm just going to disagree with you on. Mostly because we're talking about replacing a forklift with paving your entire work area in a conductive material and one or more hover pallets, each made up of a hundred or more hover engines (assuming we're comparing to a very small forklift and assuming that the 2-4 they put on hoverboard demos is around the minimum to lift a person), and at least one overhead crane (because you can't do vertical movement).
Let me demonstrate one obvious problem using a simple and common shipping and receiving task: You need to load a very heavy pallet of materials out of a box truck (say, 2 inch thick steel plates 3' x 3' in size, or anything else heavy enough that individual parts are out of typical manhandling range). It's heavy enough that the driver cannot push it to the very back of the trailer on a pallet jack.
With a forklift, you basically tie a line to the pallet, drag it to the back of the trailer, fork it and go. Unless you have a loading dock, in which case you just drive in and fork it.
With a hover pallet you need to do some voodoo to transport the pallet to the back of the (not specially floored) trailer, *then* load the pallet from the end of the trailer onto your hover pallet, then you can move it. You *could* use that overhead crane you also necessarily have to do the dragging bit like with the forklift, but cranes aren't intended for that kind of use and are harder to control when doing a horizontal tug like that (read: less safe than doing with forklift). It's doable though (until it comes time to *load* a box truck, that is). Then re-rig the pallet with the crane so you have a shorter strap, and set it on the hover pallet. Then stare at the forklift driver for the next truck over who's on his fifth pallet, and start crying.
Loading said box truck is of similar difficulty for the forklift driver, but an order of magnitude worse for our hover pallet operator. Why? Because you can't really push with a crane, and you presumably aren't going to ship the load still on the hover pallet, which means you need to get it off the hover pallet at some point.