Regardless of initial sales, which I personally believe could be good enough to move 1m units within the 1st month of release, the core of LBP design is such that user made content, in addition to developer tools/objects made available through the PSN Store, should ensure that the game continues to sell for as long as support, both user made and developer made, continues.
The game has the potential for endurance sales, that may end up building higher over the initial release, if the word of mouth is strong.
Most have probably noticed that the majority of the hype is coming from the press, based upon demo play, rather than through a Sony driven marketing blitz.
The fact that there are already some polarizing opinions on the concept in both extremes, typically bodes well for any new IP.







