Apparently some people in Dubai and in Europe already received the Arabic versions of what seems to be the PS4 Slim, and then put is on sale at eBay. There will be two new models (expected) and these should be announced at a press conference on September 7th.
It is expected that we’ll see a stronger more powerful model NEO) (with updated hardware, and then a slim version. The smaller model just leaked, over at the NeoGAF forums the images indeed show the new smaller PlayStation , the new model has more rounded corners and a matte finish.