Xbox One standard model going from R$1999,00 (~US$500) to R$2499,00 (~US$600).
The Xbox One with Kinect was launched here for R$2299,00, which at the time was about US$600.
The reason is mostly the dolar flutuation in the last year. Since 2013 value of the Real against the Dolar fell more than 60%. Microsft has kept the price low for a very long time but now it seems imposible to keep it.
The Xbox One standard model is still cheaper than the PS4.