So it's not a method if you like a rare steak then?
180 degrees wrong! Sous vide is the perfect form of cooking for rare steak! google sous vide steak images!
Sous vide has been in restaurants for 20 year plus, but only reached the domestic market 4-5 years ago - i was a very early adopter.
Essentially, the method involves sealing food under vacuum in a food safe plastic bag and cooking at the perfect temperature.
For steak, medium rare is around 135 F at the centre. Conventional cooking gives an overcooked outer to achieve the perfect inner. Sous vide with a 135F water temp produces perfectly cooked steak medium rare all the way through in an hour or two, a quick blast with a blow torch or in the pan gives the maillard reaction which is the browning that give meat its distinctive savory flavour in all forms of cooking. Better still, sousvide will hold the steak at that perfect temperature for an hour or co without overcooking.
http://www.cookingsousvide.com/info/sous-vide-guides/more/sous-vide-steak-guide
Pork belly and brisket (for eg) are much tougher cuts with lots of collagen I do pork belly, brisket, confit duck and similar at 80C for 24/36hours, producing fantastically tender meat. at lower temps for longer you can produce medium rare perfectly tender brisket.
If you eat out regularly if restaurants or gastro pubs it is pretty certain you regulalry eat sos vide cooked food