Eh, no. Actually they weren't. A mobile version of a phone makes as much sense as electronic mail. Cause that is what it is.
It's not like web 2.0 which isn't a newer version and also not like serverless when it has servers or cloud which isn't a cloud.
Btw. this isn't about how new it is. Just look at stuff from the 90s. The terms they also didn't stick.
Also those things had a specific well defined meaning.
Like again web 2.0 didn't. User created content, Ajax, etc. all surround that.
Not saying buzzwords can't become meaningful, but they are still buzzwords.
Also they still are wrong when they are something like serverless, which is just plain wrong.