I don't belive Pink Floyd will ever re-group again, and I don't think Roger Waters is going to tour again - he was here in 2002 and I missed it
. But who knows, maybe one day they might do a world tour again, performing classic songs such as Set the Controls for the Heart of the Sun, Echoes (my favorite song), every songs in Dark Side opf the Moon and Wish you Were Here, Dogs, Confortably Numb, and then Echoes again... 