After much speculation, it seems as though there could be multiple announcements at the playstation meeting. Sony has set the date for September 7th, and is expected to pull the curtain on the Playstation Neo. In addition to this, recent leaks have shown what is being called the PS4 Slim, out in the wild, with unboxing pictures to back up the claims(shown below). There is also rumors going around that a new Vita handheld may be announced, a surprise if it happens, due to the struggles of the current Vita handheld.
UPDATE: VIDEO REMOVED
The video above shows Eurogamer with the person who purchased the PS4 Slim from the seller Gumtree. This is video proof of the system boot, and all that is left is a confirmation from Sony.
As far as the other rumors go relating to the Neo and new Vita, take it with a grain of salt, as the Playstation event is right around the corner. I will keep this post updated as we get closer to the event.