A BBC Story titled Clash of the titans: Email v social media makes for interesting reading. Especially the quote taken from Nathaniel Borenstein, co-creator of the MIME protocol..
“Surprisingly perhaps the ones I know who have done the best job are IBM with LotusLive, which hasn’t got that much traction,” says Mr Borenstein (who until recently worked for IBM on Lotus software).
I personally think we have a way to go before email is completely disregarded as the method for business communications.. The Cloud will obviously play a big part of that, but again, many larger companies will tread that path carefully..