Basically all we can take away from the announcements yesterday aside from the dates and the location is that the Lync, MEC, SharePoint, and Project conferences are being rolled into a new event. Per the blog posts from Steve Guggenheimer and Denise, that event will be collocated with TechEd.
This is the same type of arrangement that was announced for MMS in 2013 and we know how that turned out (they backed out of it and held MMS as a standalone event for one final year), so who knows whether any of this will still be the case in September.
Trying to read much more into any of it until then is an exercise in frustration. If you were planning to attend any of those events in 2015 (assuming they were going to happen since not all were annual events) or were planning to send others, block the dates on the calendar and get permission to attend now, so that you can be ready to move when we learn more in September.