You can NOT "innovate" a particular product category for ever. It reaches maturity.
What about longer battery life, longer product life, more robust, and five SEPARATE connectors for charge, HDMI, data master, data slave and analogue audio/ear/mic. Then it could be used as a pocket sized dockable computer or a phone.
My ancient Sony Z1 nearly achieves this. My tablet is a FAIL. No way to power except on USB, previous model had a power jack. Can't connect USB slave devices and charge on USB, only USB host + charge. Only "casting" via wireless, which needs special TV HW and doesn't work with most apps. Previous tablet and old Z1 phone has a real HDMI port.
I hear there is an Apple Watch too, which is useless without an iPhone.
Apple sacrifice functionality nowadays for "marketing" appearance / "show room" cool, c.f. Waste bucket styled Mac, iPhone 7, Mac book pro touch, the x10 overpriced BT earbuds etc.