That ship has probably sailed, as Apple reportedly stopped R&D on that feature several years ago. Arguably, FaceID is more innovative than Qualcomm’s ultrasonic fingerprint reader.
A higher megapixel count doesn’t necessarily equate to higher quality, by any means. But sure, who wouldn’t want better pictures? I’m sure Apple wants this more than you do; it’s a major selling point for both new and upgrade customers, and one of the few features that actually drive purchase decisions.
This wouldn’t as much take innovation as it would simply higher cost and a change in design philosophy, i.e. switching to an in-ear (likely not possible) or a sealed design. But sure I’m all-in for better sounding AirPods, even at a $200-400 selling price.
Incidentally, Apple has one of the most innovative inventors ever in audio engineering, Tomlinson Holman—the “TH” in THX—who has been at Apple since 2011. He was likely key to some of the innovative technologies and the excellent sound in general of HomePod, and he's probably also partly responsible, along with the larger audio engineering group, for the improvement in overall sound of Apple’s Macs in recent years. (He may also have some part in AirPods, who knows.)
Industry is spending billions on battery R&D but progress is more of the slow and steady variety rather than technology breakthroughs. Apple is likely spending tens/hundreds of millions a year on its own battery R&D, with results including the innovative terraced battery used in the 12” MacBook. Effective power management is also an important factor in prolonging battery life, and Apple just acquired part of Dialog, including some IP, to enhance their efforts in this key strategic technology.
Yikes, please no. Too much optical distortion, in addition to guaranteed glare from almost any viewing angle. People also complain about inadvertent touch events but I can’t speak to that.
btw, the flexible display that allows Apple to have such a small chin on their OLED iPhones is definitely innovative, and no one else has been able to duplicate that, afaik.
Ready when you are
Not a bad list, though some (not me) would complain that this type of incremental improvement, for which Apple is famous, isn’t “real” innovation. Not true.