Prior to Xbox 720 Reveal Sony Calls Today ‘a Slow News Day’ and Reposts PS4 Teaser

Sony has poked fun at Microsoft mere hours before the company is set to reveal the next Xbox on Twitter by saying "it's a slow news day" and pointing to a teaser video posted yesterday which hints at the PlayStation 4's design.

Also – If you haven't seen our #PS4 teaser video, where have you been?! As it's a slow news day… here it is: bit.ly/12oYGG7

— PlayStation Europe (@PlayStationEU) May 21, 2013

Sony invited fans to watch their pre-E3 press conference on June 10th at 18:00 PDT or 21:00 EST (02:00 BST on June 11th in Europe). 

When Sony announced the console at a special event in February but did not reveal the design of the system Microsoft's Larry 'Major Nelson' Hryb Tweeted:

Announce a console without actually showing a console? That's one approach

— Larry Hryb (@majornelson) February 21, 2013

The image at the top of this story is a mockup based on Sony's teaser and comes courtesy of Reddit. 

Neither a firm release date or price for the PS4 has yet been announced though we'll likely receive that information come the E3 media briefing. Microsoft meanwhile is expected to annoinced their "vision" for the next Xbox tonight while their full game line-up will be showcased at E3.

This isn't the only marketing move Sony's taken today with PlayStation 4 ads appearing on several major gaming websites. They've also snapped up Google ads for searches linked to Xbox and sponsored trending topics on Twitter.