The prices went up and down last month.
I am in SF now and this hotel has doubled their prices since i booked in november.
Same with some hotels in Vegas like Caesars and Venetian. Seems like the bottom was hit and prices going up.
And also flight tickets Amsterdam - SF - Las Vegas, which i got also at the lowest rates possible

Paid 450 euro, a couple days later the price was 750 and up.
Still have to book Vegas, didn't want to book while i knew the price doubled.
The new city center is also full now
www.CityCenter.com
But Holidays are over soon, maybe their will be another price drop.
It is a game, i want the lowest prices possible.
This year was great for cheap tickets. Amsterdam - Kuala Lumpur for 450 euro, never seen that prices before.
But The USA is expensive. I am used to asian prices on Holidays, 20 dollars for a top hotel and 4 dollar for a good meal with a beer and a dessert.