A new style of MagicBand is in development according to MagicBandCollector.com.
A new post on the FCC shows some pictures of a prototype MagicBand puck that would, in theory, fit into an interchangeable strap or other items. This would allow guests to simply keep this puck and interchange different straps and accessories to their pleasing. The change would decrease pricing in custom “On Demand” straps, and mean Disney would have to buy less devices with RFID chips in them. This would also better control the number of linked ticket media east guests would have on their MyDisneyExperience account, as new their is no real limit.
When or if these will ever be rolled out remains to be seen, but it is at least being kicked around by Disney.