Kindle for Android does have features not found in Kindle for iOS:
- kf8 reflowable support (the iOS app only supports mobi and its much more limited CSS).
- in-app access to Kindle Store
- voice search for finding items in your library
- send to kindle option appears as a Sharing option on a number of Android apps
As far as getting to feature parity with iOS app, I believe this is largely demand driven. The more we use the app, and send feedback about what we want (and there is a link in the app for doing this), the more likely that feature will appear sooner rather than later.