"Hey Siri" support and possibly wireless charging case alongside AirPower charging mat.
AirPods and AirPower: Everything We Know
Some Reports of Backlight Bleeding on iPad 2
Engadget points out that some iPad 2 owners are experiencing excessive levels of light bleeding or leaking out around the edges of the screen, most notable when viewing a dark image/video. This is not the same issue as the Yellowing seen on some screens that may go away with time.
MacRumors' own discussion forum has a lengthy thread with more example photos from people who are affected. It's not clear if the issue is common to most iPads or if it's isolated to a subset of devices. The degree of bleeding appears to vary from unit to unit.