Apple-Samsung Tablet Tussle Upends Ereaders for Holidays

Diana Dawson has over the years bought her twin children digital cameras, e-book readers and media players as Christmas presents. This holiday season, she's covering those bases with one device: a tablet computer.

"They do it all," Dawson said outside an Apple Inc. store in Walnut Creek, California, after buying iPads for her now 27-year-old daughters.

Dawson’s purchasing underscores the changes roiling the consumer-electronics market. While the industry once benefited from year-end sales in categories from cameras to printers to desktop personal computers, this holiday period brings the clearest signs yet that