Yeah probably but then again, I imagine a Blu-ray drive would consume slightly more power than a DVD drive, so it may be slightly different in amperage.
Old PS3 had the power unit built in whereas it looks like they've moved the power unit to an external unit... hopefully it's not as chunky and heavy as the Xbox 360 one.
I guess the positive thing is that for those that buy a unit from overseas can simply replace the ac unit as opposed to using a step down converter.