The PS3 is simply too expensive over here and relatively elsewhere, coupled with the fact it has very few games.
Consumers are wise to the fact its not anymore next gen than the 360.
Having read the news and responses on a few more forums today, appart from the blind ignorant fanboys, the consensus is the PS3 is too expensive (good value is a different thing), not enough games compared to the 360, and with the age old reliabilty argument dieing a death this week due to MS's new warranty support, it has very little to support its self in the market. BR is not enough of a selling feature as they hoped it would be by the look of it as predicted.
Imagine if MS did a 360 GTA4 bundle premium for ~ £200 come the end of the year....PS3 would be left treading water (probably will be anyway).
So even if the PS3 reaches the £300 point (which it already is/should be in dollar terms
) I doubt it will help matters.