From the article: "We hope everyone is as excited about this contribution as we are. IBM will continue to maintain and support Symphony for our customers until we are able to offer Apache OpenOffice with what we hope will be most of the value we are contributing today."
In other words, IBM wants to have others to work for free to maintain their code. As others have already pointed out in this thread, using LO as vehicle for that will probably not succeed.
BTW, calling AOO a fork reveals some cognitive dissonance.