People aren't going to suddenly stop calling it Twitter and tweets.
I doubt it will have much impact on marketing. It's most just a domain name and some corporate heading stuff.
The only utility and potential confusion is a single letter domain for linking to tweets until people get used to it. But on sfuff like imessage, SERPs etc it pulls in the <title> tag above the domain so it's not the only signal
If sub-generational slang can come and go in a single-digit number of years, I think the population at large will have little problem forgetting "Twitter" and "tweet" as general terminology. The verb "to google" has stuck around because Google is still around, though I'm sure there's some threshold of time where terminology gets passed down and sticks (velcro, kleenex, etc).
I doubt it will have much impact on marketing. It's most just a domain name and some corporate heading stuff.
The only utility and potential confusion is a single letter domain for linking to tweets until people get used to it. But on sfuff like imessage, SERPs etc it pulls in the <title> tag above the domain so it's not the only signal