That's one great piece of news. But they are still planning a european tour, so that doesn't answer why they wouldn't be supporting Opeth.
Me and a friend of mine are planning to travel down to somewhere in mid-europe to see Porcupine Tree live. Final destination is still undecided since the tourdates and -places are still to be announced. Waiting for them... If they however come here to Finland then we aren't going anywhere, but knowing PT I think I'm not going to count on that.