right now all pumps, at best, get input from the user to know how much insulin to administer. We take a glucose test, input it to the pump with the expected carbs we will eat, and it tells us how much insulin to take, then we okay that and it delivers. The artificial pancreas (AP) will make the gigantic leap to closed-loop control, where the pump takes readings from a glucose sensor on the body (like some do) and feed the information into a program that tells the pump the amount of insulin to deliver by itself, and how long to deliver it. It is constantly updating itself from the sensor, figuring out the rate of change of the glucose levels, and calculating the expected glucose level about 15 or so minutes ahead, and then figures out how much insulin to take to counter that expected glucose level. It is much like control systems in everything from building air conditioning systems to spacecraft.
So what brands to expect out in 2018, the expected year of market entry for APs? I found this site to be informative.