If the smartphone’s days of glory are over, there may be opportunities for revival, for companies which missed out on that glory. Nokia, with its long history of reinvention, bought a smart healthcare company, Withings, in the same week that its formerly mighty handset business was crumbling to pieces at Microsoft. This could signal a return to devices for the Finnish firm – but devices for new uses, not old – and to its adage of the 1990s, that in the early years of a market, a company needs to offer both infrastructure and endpoints, because they drive each other. Nowadays, Nokia includes cloud IT platforms and virtualized network functions in its definition of infrastructure, but the theory of cause…