The Android Emulator plugin lets you install the APK, but not launch it.
It'd be awesome if you could also launch the installed APK. Maybe another checkbox alongside the existing "Uninstall existing APK first" checkbox that says "Launch after installing APK"
It's easy to launch an app with adb:
adb shell am start -n com.package.name/com.package.name.ActivityName
This feature would be great because some automated testing usecases require the app to be running.