Not sure on Android. They already work on some replacements. They probably will have some mobile OS for the long-term future, but not sure if that will be Android. But there probably will be some compat layer, at least for the beginning, when/if they plan to roll out some successor/replacement.
Maps as a user yes. As a website owner it fucked over millions of pages with its exorbitant price hike.
Maps! Yes, how can I forget this gem? Search is how we usually define Google so I thought it best to leave it automatically assumed.
On a personal note, Keep is something I would love to have around for the foreseeable future since I use it a lot.