Support of Windows XP ends at 2014-04-08. There is a lot of fuss and fear around this and many arcticles on what you should do but I haven't found a clear explanation: What does the end of support actually mean?
There won't be any new updates. This is the only thing which is clear.
Will we be able to get the old updates? This resource weakly suggests that yes, but I haven't found any more confirmation of that.
Will we be able to install Windows XP on new machines? There was some procedure of confirming the key over the network (registering windows), so will this work as before?
Are there any other direct changes for users of Windows XP?
Note: I am not asking on security consequences of the above, and have my own opinion on updates of this product, so please be so kind and skip the big warnings and disclaimers how it's impossible to use XP without updates. There have been a lot of scaring people and no actual explanation of what actually is going on - this question is meant to fill in the gap.