If this is happening for the want to find the next best thing, I plead with Apple to just stop and ask themselves how many people actually want this, and is it going to be adopted on a large enough scale to warrant the research and development.
I say this with no malice or negativity. Apple have the bones of a business ready to take over the world.
They have forged a synergy with current customers by creating incredibly good computer chips and nice computer/laptop designs/quality (for the most part).
Focus on that, lower the prices of upgrades and pour money into improving software rather than wasting it on vanity projects very few people actually want.
From cars to VR to health ring pieces. Seems like a case of ignoring your core audience to entertain a bored minority.