128GB+ SSD or 1TB HDD(plus ssd cache)
long battery life, 2/3 rule - 6 hr advertized = 4 hr real
third gen intel i5/i7 processor
or AMD A8/A10
Intel HD4000 is not a gpu and does not perform GPU intensive activities like games. it plays movies and does regular tasks just fine
resolution of 1600x900 or higher (1080p=1920x1080)
weight: depends on person, but I think anything under 5 pounds is light.
look for the term "ultrabook", intel has specifications for manufacturers to follow to be called an ultrabook. it might suit your needs.
Lenovo thinkpads are known for high quality, and a touchscreen IS important for windows 8