Apparently in photography this applies the most to camera bags. Once upon a time there was Billingham and Domke, then LowePro and Tenba were pushing the zeitgeist envelope. Crumpler changed things again, with a bold shift from purposeful to trendy.
Now Naneu Pro comes along with a healthy range of baggy products to cover all bases. Florida-based Naneu Pro redraws the bagosphere yet again with its multitudinous ranges.