NewSQL vs. NoSQL for New OLTP (2011) [video]
youtube.com
youtube.com
The only interesting slide is the last slide VoltDB (new kid on the block), promises some nice performance..., but that's the only slide that actually talks about it (out of 30?) and does not really support it. So HN adpost ?
This page from VoltDB explains far better "the reasons behind the VoltDB architecture" (http://voltdb.com/products/featuresbenefits/reasons-behind-v...).
It's dangerous to underestimate them, because they have money, smart engineers and a machine of a salesforce, with support and relationships that help them sell to lots of customers. But they don't keep me up at night, and most of the deals we see Oracle in (at VoltDB) start with the sentence, "We're looking at TimesTen replacements."
A key thing here is Oracle also costs a truckload of money. Price pressure on Oracle as startups and Open source (or combos) mature is an interesting thing to watch.