I've been saying for the last year or more that Twitter is doomed. I stand by that prediction. Twitter was originally envisioned as a place for real-time status updates. It became a place where, to a certain extent, news broke but now? It seems to be a graveyard where people follow celebrities.
Not that there isn't necessarily a business model in following celebrities but it seems like the difference between being Facebook and being Myspace.
Twitter is (IMHO) terrible at conversations. As others have mentioned, they're disjointed.
This post raves about Twtitter's real time abilities and potential but:
1. There is only real-time data to process while people use it and, honestly, I don't see the incentive to produce it. Twtitter just seems to be another box your brand management company checks on their social media checklist; and
2. There's still no hint of a business model anywhere.
Honestly, the idea that Twitter will be "bigger than Google", even for a narrow area like "real time", is laughable.
I see Twitter as another "bubble" company (like Quora). People in the Valley think it's big because "everyone" (in the Valley) uses it but this gives a very distorted view. Twitter is more mainstream than Quora but I wouldn't be surprised if Twitter's 7-day actives were much lower than the ~175 million accounts and stagnant, even waning.