Bluetooth reliability is better than any other headphones, battery life is impressive for how tiny they are, pairing (with iOS/macOS) works better than other bluetooth devices, the charging case is better thought out than other "true wireless" earbuds. Customer satisfaction surveys are ridiculously positive (IIRC 98% or 99%).
I haven't bought them yet myself (just because they cost money), but maybe when the 2nd gen comes out I'll take another look.
* Wireless charging case
* More controls (perhaps touch sensitive long-press for Siri)
* Better switching between iOS/macOS (or generally - better support in macOS)
* Stereo mic support
* Native lavalier mic support in iOS camera
* Waterproofing
* One-device-multiple-airpods support
* Much much much lower price
* Thinner case
* Hearing aid feature (iOS 12 sort of does it via iPhone mic)
All that said, it's my favourite Apple product in past decade.
I can just tap the side of my wool cap with thick-ass winter gloves and it works. If it was touch sensitive, I'd need to take off my gloves, pull the cap over my ear and fiddle with the earpiece. No thanks.