As smartphone market matures, makers race to wow consumers

The two dominant smartphone makers, Apple and Samsung, are still fighting over the declining share of Americans who don’t have one. They are using slick television commercials and aggressive lawsuits against each other because the devices remain critical to their bottom lines. But some analysts say the phones have reached their technological ceiling. New versions have struggled to wow the reviewers and average consumers, a factor particularly important to tech firms, which often sell more products if they are seen as cutting-edge innovators.