No question this info was leaked as MS knew that the upgraded PS4 would beat them to market and would be a focus at E3.
Sources: Xbox One getting huge upgrade in 2017, slim model later this year | Polygon
Interesting question becomes how this evolution in a console's lifecycle will change the console sales. If a new model is introduced for both consoles as is expected, does it really change the game? You'd have to think that the base model will still outsell the upgraded model by quite a bit and that's where Sony still has the edge. Is MS looking to pull PC gamers off their PC by offering the big upgrades that can compete with PC's? By being first to market likely by a year, does Sony put themselves in position to do a price cut in a year to undercut the new X1 release? Or do they delay the 'Neo' until next year and reengineer it to meet or exceed the new X1 specs?
So many changes on the horizon. Should be interesting to see it all go down.