[pessimizer]

I don't think they will. The problem with them isn't that people don't understand what they mean, it's that they require a lot of context to understand even when they are used naturally and freely. There's a reason why languages have grammar. They're really used for decoration, or to disambiguate between a short list of expected responses already established in the past by using words.

i.e. a handful of emojis to explain the state of a machine is no more expressive than using a handful of colors to do the same thing. In that situation you'd react the same way to an emoji that I've thrown at you for the first time as with a color I've thrown at you for the first time. Suddenly the indicator is violet, or the indicator is smileyface emoji with big hearts for eyes: the question is what that meant to the programmer, and the emoji doesn't give any more indication than the color. "Are you trying to tell me that the server really loves my new blouse?"