According to Leichtman Research Group (LRG), that’s up from 50% in 2014, and 24% in 2010. Overall, there are more connected TV devices in US households (like Roku, Chromecast, Amazon Fire TV, Apple TV, video game systems and/or a Blu-ray players) than there are pay-TV set-top boxes (STBs).

Among those with any connected TV devices, 76% have more than one device, with a mean of 3.5 per connected TV household. Across all households the mean number of connected TV devices per household is 2.4, while the mean number of pay-TV STBs per household is 1.7.

Other findings include the fact that overall, 25% of adults in US TV households watch video via a connected TV device daily - compared to 11% in 2014, and 1% in 2010. That includes 43% of those aged 18-34, 26% of ages 35-54 and 10% of ages 55-plus. Also, 22% of adults with a pay-TV service watch video via a connected TV device daily, compared with 38% of pay-TV non-subscribers.

A full 79% of all TV sets in US households are HDTVs - an increase from 59% in 2014, and 11% in 2007. And, 38% of non-4K Ultra HDTV owners have seen one in use, up from 10% in 2014. 31% of those who have seen a 4K HDTV in use are interested in getting one, compared with 7% of those who have not seen one.

"Connected TV devices continue to expand both in terms of the percentage of US households that have connected TV devices and the frequency that people are using them," said Bruce Leichtman, president and principal analyst for LRG. "Yet, with 81% of connected TV households also getting a pay-TV service, choices provided by connected TVs are generally being integrated with traditional viewing options."