There's nothing new about curating the news and aggregating content. It's always been part of the role of journalism, selecting and presenting information, and editors have always done it. Aggregation is not curation. Aggregators pull together, and allow you to assemble, news from a variety of sources in one place. Those that also curate the news spotlight stories and often package content based on algorithm and/or the work of editors (ie there's some type of judgment involved and usually context created).
"Global Voices aggregates, curates, and amplifies the global conversation online attampting to shine light on places and people other media often ignore"