The basic idea seemed to be this: make it easy to set up a table anywhere (via API connections to Yelp, Eventbrite, Meetup) and meet with people. Even if they're people you don't know, you could organize around an idea or topic.
I have a Meetup account, but I never use it. I'm a member ("member") of a number of local groups, and I get the weekly updates, but I never use it. The regular schedule of the meetups make them seem like pseudo-organizations, and I'm not interested in that. And the feeling I get from the meeting announcements is that they're aiming for big crowds, but there only seem to be a few people actually signed up. It all seems a little off for me, so I never use it.
TableTalk sounded nice to me because it seems to be aimed at a smaller audience per meeting—the size of a table, obviously. And it feels like a one-time thing for each event without any unnecessary obligation, even if you do repeat the events. The demo app worked quickly as well.
It's planned for launch in a few weeks. I hope it goes well. I think it could go far.