[ethbro]

If they're shipping by Q1, then they know exactly what the details / specs are.

If they haven't released the price, it's more likely because FB wants to throw some serious money behind the marketing push. Which either means they were going to anyway, or the price is going to shock people.

[potatolicious]

Sure, they definitely know what the details and specs are, but they also want to make a big deal out of said details/specs, and dropping it silently on a web page isn't anyone's idea of a big launch.

It's likely that there are substantial differences between the product and the DK2, or even what's been discussed in previous interviews/previews, so it makes sense to not talk too much about the product until they're in a position to present it properly (e.g., a big keynote followed by journalist demos).

And yeah, it's going to be expensive - the fact that they've said as much in previous interviews means they've already been trying to soften the ground for the revelation. It's almost certainly going to be more expensive than the DK1/DK2.