1cm is good for NFC-like uses -- you don't want to pass around your ehem files to another nearby laptop eh. That SiBeam flashdrive shouldn't randomly connect to another device just because it got within range -- remember, its vouching on physical security just like the wired bus its supplementing.
Its supposed to act like a 'wireless wired' connection -- the devices are fooled into thinking they are connected physically but IRL its wireless.
I'd like something like this. Think about just throwing your flashdrives and harddrives and cellphones and USB hardware key dongles and whatnot into a basket -- no need to even waste your time connecting them! I mean, this technically supercedes USB Type C's reversible connector and everything by not even having to plug anything in (except perhaps adapters.) Its similar to the old MS Surface's (the table top computer) ability to use phones that are put on top of it. The phones would act like as if they were connected -- in SiBeam's case, virtually physical.