The second letter of those titles can now be replaced with x, as in a variable or an unknown. See the following quotation:
> Born physically male, Bond is transgender and eschews gender-
> specific honorifics and pronouns, preferring, respectively,
> "Mx." (in place of "Mr." or "Ms.") and "V" ("vself" instead
> of "himself" or "herself").
Language evolves with the culture and the technology available for changing the culture.
To answer Baker's question, I suspect that titles will be dropped.
I rarely see titles of any kind in emails, chat, and messages. Does anyone have statistics about changing frequencies?