Of course Apple has prototypes like this. And they have gotten their hands on Samsung's initial attempts. Apple has an insane R&D budget. When they talk about 1,000 no's before one yes, this is what they mean.
But this is also a niche product that Apple would never release, even if it was decent for some users. Apple just doesn't have a brand now that allows them to release stuff that could be utter crap for many users. At least when they release something horrifically expensive, it works well and the users will know that it is expensive and get a clue that this is something that they should pass on unless they have a real need for it. But this item is not expensive enough to keep Apple from being hit by tons of complaints if they released it. This is the opposite of something that "just works". This is a luxury tech device for someone who knows they won't be using it for more than 6 to 12 months. Buy it as a fun gimmick and get a few stares and questions about what you have. That is fun for enough people.
In before someone mentions the MacBook keyboards.