Yep, ASR does fantastic work and is working on bringing full seasons from the 1990's (at this point there's also a single Lotus from the late 1980's). We already have a full 1992 season, which is mind blowingly awesome, both physics and graphics.
Then there is the official content from ISI, the FISI car, a generic 2012 F1 car. The Marussia MR01 has been created as well, and is no doubt the most realistic F1 car you'll have ever driven in a sim. When the car is hopefully updated with CPM and chassis flex it'll be even better and no doubt the most accurate virtual F1 car available.
The Brabham BT20 is also available, along with a couple of 1960's F1 cars with fictional names. ISI also holds the license for Senna's 1984 Toleman (announced back in 2013 IIRC), and they're planning to bring us F1 cars from each decade.