Sony confirmed the price for the PlayStation 4 to be $399 / 399 EUR / £349. A rather cheap console considering what it has to offer.
They also revealed that there will be no restrictions on used games, no always on and no check-ins. PlayStation+ membership will carry over to the PlayStation 4 and I think the only downside to the announcement was that multiplayer was no longer free. PlayStation+ will be less than $5 a month, which is cheaper than Xbox Live Gold membership.