Majority (I think) of end user community uses java_client for the native app testing. Some methods which work against web/HTML UI won't work at this case:
- Methods related with the finding by css values/link tests doesn't work at all or at all most all cases.
- I'm suspecting that methods of Selenium Mouse/Keyboard interfaces don't work too. If it is impossible to reimplement them then they should be declared as deprecated.
So I think an end user has to be informed about these things.