Google is updating all the time. It used to be that they put out large bundles of updates in one go but now they tend to do incremental changes. That said they still do put out 'named updates': The last one was on October 4th and was a data update to Penguin, nothing dramatic.
People who have something to sell you understand that they can sell more 'stuff' when they offer to sell umbrellas to protect against falling skies and so there is an ongoing buzz from vendors about this change and that change.
The last change that is significant was the Hummingbird update which was, for Google, a huge change as they replaced a significant part of their ranking code. Although it was announced in late September it actually happened about a month earlier. This change was to enable improvements in natural language search and, in the longer term it means that we should become more interested in Latent Semantic Indexing (LSI) but for most of us it means that we carry on producing good quality, well written content.