>You forgot Hangouts, which works on Android, iOS, and the desktop. It supports text, voice, and video, just like Wire.
So that would be the "what's hot now".
I didn't mention it because few people I know use it. And I wouldn't touch it a Google + Google+ affilicated messaging solution with a 10-feet pole anyway...
I wouldn't say that it's "hot". It's recently become more popular since Google started forcing it on Android 4.4+ users as the only SMS option on their phones. Personally, I wouldn't use it at all if not for easy group communication with my Ingress mates (most Ingress communities use Hangouts, Slack, or both; ours uses both but mostly Hangouts).
I just felt that it was a glaring omission, especially considering its more popular and more reliable precursor, Google Talk.
So that would be the "what's hot now".
I didn't mention it because few people I know use it. And I wouldn't touch it a Google + Google+ affilicated messaging solution with a 10-feet pole anyway...