For a games console, it is expensive if you look at past launch prices.
But as an home entertainment electronics device, it doesn't seem so expensive.
I mean, I recently paid €580 (rrp €699) for my dvb pvr, and it's a common price for such a device. It does what pvr's do, records digital TV to a HDD and little else. I'm sure there's a lot more air in it's price than there is in PS3 and I'm sure the PS3 is a lot more finished and polished device than that buggy pvr.
It does seem Sony is about to differentiate the Playstation brand from being what is traditionally known as a games console, but class it as one home entertainment device among TV's, receivers, DVD/Blu-ray players and such, that have traditionally been priced a lot higher than games consoles for what they actually are capable of.
It's not that the high price actually came as a surprise though, Kutaragi has always said it'll be expensive and that you'd have to work overtime to afford one