User blog comment:Ygrain/ME sequel: what shall we do with the extinct races?/@comment-1786741-20121123181305/@comment-24174486-20121123182354

Based on the scene being impossible to obtain in the Control and Synthesis endings (the two choices which require the destruction of Shepard's body) and being a better version of the other Destroy variations, it's safe to assume that they're not just showing a last breath. The Extended Cut epilogue makes it more clear when Shepard's name isn't placed on the Memorial Wall.