Already mourned about this when I first found out the news, all my favorite hardcore bands are breaking up! But it is true, for the type of music they played they had a very successful career, and I can't say I didn't see this coming. Just not so soon after the release of Lucky Me.
Don't worry about it. I had the same thing happen in 04/05 when all my favorite newer hardcore bands (Champion, Give Up The Ghost, The Suicide File, From Ashes Rise etc), broke up. Bands like Verse, Have Heart, Ruiner and Killing The Dream came to replace them, so I'm sure the same thing will happen now that they're all gone.
There'll be a great new wave of bands, no doubt about it. Now they have a new set of influences too, which combined with the earlier eras should make for at least 5 brilliant bands.