The PS Vita Slim has already launched in Japan, but so far Sony has said nothing about bringing it elsewhere.
Sony has sent out breakfast briefing invitations to select members of the press to introduce PlayStation's "slimmest" launch. Seeing as how the PS4 launched not long ago, several people have speculated that the announcement will concern the PS Vita Slim, which is already available in Japan.
The PS Vita Slim, also known as PS Vita 2000, was released in Japan in October 2013 in various colors (white, gray, yellow, pink, brown, and black). It's 15 percent thinner and 20 percent lighter than the prevous model, includes 1 GB of internal memory, and the OLED screen is replaced by an LCD one. The slim also charges via micro USB instead of a unique charging cable.
With remote play, Sony wants to promote its handheld, which can be used with the PS4 as the company announced all PS4 games would be compatible with remote play on the Vita. At the moment, a slim Vita announcement makes the most sense. It's also too early for a slim PS4 and much too late for another PS3 slim - unless Sony is really banking on making this the true "introduction to the slimmest." The PS3 has both a slim edition and a super slim edition already. Sony also plans to support PS3 through to 2015.
The invite states the event takes place Jan. 30 from 9 a.m. to 11 a.m. Until then, whatever will be unveiled is up for guessing.