It is always hard to weed out of patent-speak what is really going on, but on the surface, as I read the claims, I keep thinking "are we not already doing that?". Maybe there are people who could point out what I am missing. I see that my question is similar to others asking about patents on electronic forums.
This is not a patent, but a published patent application. The claims are published as originally filed. If and when the patent is actually granted, the scope of the independent claim will likely be further limited.
It seems the PCT application was originally sent to the EPO, but they declared lack of competence, possibly because it was considered to relate to business methods.
The subsequent International Search Report prepared by the USPTO seems to indicate that the USPTO may be inclined to grant claim 11. This claim specifies the automatically updated display of persistent online conversations across multiple devices.
Not sure if this can be considered an invention in January 2013.
A January 2013 priority date isn't going to help these guys get to allowance. According to portal.uspto.gov, the application is on final rejection (mailed 11/28/2014). This is the fourth rejection in this file's history (it was given a non-final rejection, then a final rejection, then a request for continued examination was filed, then a non-final rejection was issued, and now it is on final rejection again).
If you think you have prior art that would impact patentability, you can always provide it to the patent lawyers who are prosecuting the application (search Public Pair at http://portal.uspto.gov and search for 13/748,526). Because patent applications are ex-parte proceedings, the lawyers have an obligation to provide a copy of material prior art to the patent office.
But bottom line is that while there is always a chance that a patent application on its fourth rejection will eventually issue, this isn't one that is currently well positioned for issuance.