Is Disney Replacing Magic Bands with these?

According to the website MagicBandCollectors.com, the next phase of Magic Bands are currently in development to create these puck-like devices that would be able to have interchangeable straps. A new post on the FCC shows some pictures of a prototype MagicBand puck that would allow for interchangeable bands similar to a FitBit. This would allow guests to simply keep this puck and interchange different straps and accessories to match there mood and outfits.