Long-anticipated era of convergence in consumer technology products draws closer, Wharton faculty says. Microsoft, Google, Yahoo and Intel among companies looking to expand into consumer electronics. Manufacturers are responding to tech-impaired consumers with new systems that make it easier for different devices to work with one another. A fourth screen, the iPod or another portable media player, is also emerging. Technology companies are focusing tightly on their core areas of expertise rather than spreading themselves too thin, professor says.”]