You mention Lotus Notes: I seem to recall reading Lotus Notes was a cool idea ("groupware") that didn't take off despite passionate proponents, and that it lead to Lotus being vulnerable to being bought by IBM and... ceasing to exist. Maybe today's tech foundation (HTML, web, etc) and now-online target market will cause a different outcome.

I hesitate a little when software is announced before it is released (e.g. google was just released); and when something is presented as a universal solution (but neither of these prove anything).

I think it must solve a problem that I personally don't have, so that explains my (personal) lack of excitement (note: many things have had massive success that I haven't been excited about, so this isn't a criticism of the tech). I tried to watch the Video of it, but it just didn't grab me enough to keep watching (again, just my personal reaction). Perhaps my perspective is really "we had non-interactive email... and we liked it!" and "get off my lawn".

PS: Re "troll". I thought I was asking a straightforward question, though skeptical. Observation: if a non-enthusiast's innocent request about a tech feels like a troll to that tech's proponents, it forms a barrier for adoption beyond the proponents. Not judging, just noting.

Re karma: I periodically start a new account on HN, because I believe karma distorts perceptions. Luckily I didn't ask this question at the start of a new account, or (it seems) I would have been dismissed as a troll.