Say goodbye to your 30 pins
blog.punchthroughdesign.comI would add that Bluetooth Low Energy isn't totally free. Somewhere in your cost you have FCC/IC/CE testing, Bluetooth licensing/testing/certification, possible software stack cost and more expensive components (radio, antenna, etc). You also have a larger power requirement as low energy isn't as low as UART. I won't give specific numbers here as I cant't legally, but the cost difference is probably a wash. That's assuming your doing the radio layout and not using a module. Apple's move to wireless is definitely for their sake. I could also see an argument made that because of the possible extra costs for doing Blouetooth Low Energy (chips, testing, power, RF design, etc) you may see less accessories for a while.
In any case I think you're right that the tell tale signs are there.
The move to wireless is one part Apple's sake, and one part for users (no parts left over for developers, unfortunately). People tend to favor wireless accessories and associate a higher value with them. In some cases it just makes more sense- people want to use an accessory without handing over their iPhone (I'm looking at you, speaker docks)
The cost may be a wash, but it really does level the playing field.