I don't get why people always act so surprised and also act as if this trend just couldn't possibly continue. I'm willing to bet that a lot of these X1S sales are to people who own PS4s. When you sell as many consoles as Sony did from launch, sales of the console have to slow down at some point. And MS finally has gotten their shit together now that Spencer has been at the helm for a while - the messaging is finally on point, BC is a great goodwill gesture (even though many people here try to act as if it doesn't matter), and the UHD drive that people swear no one is using is in fact a factor (I now know a few more people who bought one because of this - Best Buy in particular seems to be really pushing it to people buying 4K sets).
I don't think the Pro is going to sell as well as so many seem to think. Not that many people outside of the hardcore are going to get rid of their PS4s and upgrade. Sure, some will, but I'd bet less than 10% of the PS4 base does. People who haven't yet bought a PS4 may opt for the Pro, but I think Sony really needs to work on the messaging to get it beyond the hardcore - most shopping for their first PS4 will get a Slim, I'd bet, as the casual consumer currently won't really know what makes the Pro better (I've had several people ask me).
What I really don't understand is why is it even such a big deal to some that the X1S is selling well right now. I turned on my PS4 not long ago earlier tonight, and it still worked, even with the X1 S outselling it the last few months (my X1 and Wii U are still working as well). Sales trends are always interesting to discuss, but where does the emotion come from?