This still doesn't address the relative lack of content
I use my mark 1 Chromecast extensively for iPlayer, renting films via Play and netflix and it works like a dream. It has the best user experience of any streaming box I've tried. My Samsung "smart" Bluray is slow, clunky and apps like Netflix keep getting pulled.
However, the irritation with Chromecast is the lack of people making native apps for it. As the article mentions, outside of Google properties, iPlayer, Netflix and Now TV there are just a load of no name apps. I also want ITV player, All 4, Demand 5 and Amazon Instant Video. It is annoying having to stream these from my PC via casting from Chrome.
I can't find a single streaming box that can handle all of the content providers I want to watch. If Google could find a way to let you start streaming video from any source via your mobile/tablet only then Chromecast would be the best thing since sliced bread. I suppose that will wait until all content providers are using HTML 5.