The PDP book is the main textbook for a course I'm taking at CMU called... PDP. It's digestible, but man is it weird to see things like "this is an ongoing area

The PDP book is the main textbook for a course I'm taking at CMU called... PDP. It's digestible, but man is it weird to see things like "this is an ongoing area of future research" where the future = after 1986. I find it kind of hard to relate to for that reason — how do I know (besides asking my prof., whose PhD advisor was Hinton, or doing my Googling) what ideas ended up "sticking"? What areas of future research went nowhere vs spawned whole new subfields? Is there a more modern textbook of the sort I could cross-reference? edit: here's a link to the course website: http://www.cnbc.cmu.edu/~plaut/IntroPDP/ http://www.cnbc.cmu.edu/~plaut/IntroPDP/