Slate financing is basically an investment in a film portfolio, rather than a single film, in order to spread out the risk that comes in placing all the eggs in a single basket. In this case, the dollars will cover between 20-25 upcoming films, which include the next projects from David Cronenberg ("Eastern Promises") and Ang Lee ("Se jie" aka "Lust, Caution").
The resources cover only production aspects of film projects, and the investment has no stipulations or ramifications for project selection, or for any creative aspects. Focus Features is also, under the terms of the deal, still free to seek other forms of financing, though perhaps they won't, as they're trumpeting the deal as the largest yet made for a specialty-films division.
They also clarify that this deal does not mean larger budget films are on the way, only that it takes some of the guesswork out of their production bookkeeping (and possibly an expanded slate in the near future.)
Source: Variety