An announcement has just been made that from 20th March the Sony eBook stores in the USA and Canada will close, and that their business, and ongoing customers, will be transferred to Kobo. It is part of a wider re-structuring in the company, but I'm still sad to see it happen. Sony was a pioneer in providing an e-reader platform and an ebook store, and helped open the retail industry to independant authors.
Its problem, though, was that it couldn't keep up. I know of only one acquaintance with a dedicated Sony ereader; I know of no one owning a Sony tablet who purchases their ebooks from Sony. My titles are distributed to Sony's Reader Store via Smashwords but sales can be counted on one hand. According to the update from the Smashwords blog, I'm not alone.
This is a warning for writers as well as retail sellers. We need to stay close to the head as the market writhes.