I have been seeing this for a while now. I have noticed when running queries on sites I manage that the query result on 4 word key phrases are returning snippets from two different parts of the page that has been returned. For instanceon one site I have products we sell and lower down the page I have events that go on in different cities around the state.
The purpose of this was to inter associate the geographic area we target with our products.
The new serps are producing that product searched for and another snippet about the city and the event. So if someone searched green widgets for sale in someplace, state it produced the above referenced.
It's time totake serious the amount of content on ecommerce type sites. Metas may not have anything to do with it in the near future. I think googles new technology is combining semantic linguistics with whole page digestion.