That said, I really, really don't think anyone's going to make a move until they know what Nintendo's doing. Microsoft's gonna gloat over beating Sony, but all their price-cuts aren't targeted at them -- MS is after a share of the Wii market.
I don't really agree with this. I read a pretty well thought out post on GAF the other day where someone pointed out the objectives of all three parties this gen are quite different, and don't necessarily require being number one.
Nintendo obviously realised they couldn't beat Sony in a tech fight, and chose a quieter, profit-driven model. This started with the Gamecube, which made money despite being the last-placed seller. With the Wii they targeted a brand-new crowd because they knew they wouldn't have to worry about competition - and it has worked wonders for them.
MS on the other hand entered the whole console race purely to keep Sony out of the role of "owning the livingroom" in the same way MS "owns the PC market". The Xbox was a horrible loss but they didn't quit - and I don't think would have quit this gen because they need to have a device in the living-room which is an extension of the PC market they are constantly pushing in terms of growth. While they're going for "casual" crowds now, they (IMO) aren't trying to beat Nintendo - they just want to ensure they have a window for as many people as possible to browse their closed marketplace, so they can have a storefront in every home where possible.
Sony on the other hand fought for media domination, and won. Now they're trying to regain the fight as the trusted "Playstation brand", because it's Sony's most important IP. It's less around ensuring they make stacks of money with the Playstation 3 (as an object), and ensuring that the "Playstation" name is there in the future and trusted by customers through this generation and moving forward. They are succeeding to an extent, since there are obviously many who are PS flag-wavers all over... but it will be interesting to see how the brand fares if they end up in last spot this gen, and some feel burned by the price-premium they've paid.