But the #1 thing that stops me from even considering buying an Android device is "it's not iMessage".
iMessage doesn't have single click to video, but it's also automatic. No hassle at all and I can blue bubble send perfection to any other iPhone-r. It's also synced to all my devices flawlessly.
I think that's what is really missing. People don't mind opening another app to place call / facetime / hangout video. They want simple, clear phone messaging that isn't an "app"