Not even an Apple-sized company will be able to successfully execute on it if the customer doesn't want the device to begin with. Look at VR headsets, for example. All the biggest tech behemoths burning through billions haven't been able to make the device category work, simply because no one wants to sit at home with a bulky headset strapped to their head shut off from their family and the outside world.

Similarly a little box pinned to your chest projecting a display on your palm showing the weather makes for a good tech demo, but ultimately there is no real world use case for this device.