Some 200 million Americans will own smartphones or tablet computers by 2015, with many people having both, marketing intelligence firm In-Stat forecast on Tuesday.

"This market trend will have a huge impact on how video entertainment is acquired and consumed," the firm predicted in its forecast.

Technology titans such as Google, Apple, and Microsoft have been staking out territory in a "post-PC" world marked by people tapping into the Internet from instead of desktop computers.