Email's a standard dating back to the 1970's, but amazingly continues to be widely used by enterprises as well as consumers.
My contention is that the email standard hasn't evolved much over the last few decades and that it's quite crude, take for example the process of responding to questions in an email; most users reply with the original text quoted and then proceed to answer inline with a colored tag to distinguish text author--1970's??
So upon thinking about how to simplify this, I came to the conclusion that Social Apps like Facebook already have the answer! Facebook provides a means to post and receive comments without having to quote text, the flow of conversation is much more contextual (and efficient in terms of text stored). ever read an email with 20 or so replies that logarithmically expands because everyone's quoting the previous mail? The concept of a social group and belonging to groups is synonymous with an email alias. you can control access by deciding who's your friend. Attachments can be added. So what can't you do with Facebook or your favorite Social App that you can do with email?? For the record, Facebook has its own email service i'm certain for legacy purposes.
The only thing i could think of is that email is more anonymous in that you could send anyone an email so long as you had their email address. With a Social App, you'd have to be befriended first before having an actual conversation.
So the ultimate question remains, is email still needed! let's say your office got rid of email and adopted some Social App in favor, let's also say that there was some Social App standard so that they were all interoperable, i.e. you wouldn't have to join a Social App every time, you could just use your own. There are a lot companies that use a CRM which is a natural integration point for a Social App Portal.
I'm predicting the end of email in 5-10 years, what say you hackers?!
And if email didn't exist anymore, what's a blackberry to do? can you imagine the interface?
It's worth noting that mailing lists could have been replaced by blogs and web-based forums a decade ago, but they were not. Before that, usenet was arguably superior to mailing lists, but it was usenet that died out{1} and mailing lists survived and thrived.
It's worth noting too that though newspapers are being killed off by the internet+tv+radio, they are still around, and will continue to be around for much more than a decade, despite repeated predictions of their imminent demise.
So, even if you can persuade me that e-mail will die out (you haven't), I will remain sceptical that it will happen within 10 years. Certainly not within 5.
{1}: Usenet is still around. Apparently.
P.S. "Email's a standard dating back to the 1970's, but amazingly continues to be widely used..." AM radio dates back even further and continues to be widely used also, despite the long-available superior technology of FM radio.