comScore has published its latest MobiLens figures outlining mobile and smartphone ownership in the US.

The company estimates that 123.3m people in the US owned smartphones in the three months to November 2012, with 53.7% of them Android handsets and 35% iPhones – up 1.1 and 0.7 percentage points respectively compared to August 2012.

With BlackBerry and Windows Phone sliding to 7.3% and 3% respectively, Google and Apple’s platforms are now hoovering up 88.7% of all smartphones in-use in the US.

There’s some good context on this growth from a couple of other sources today too. First, Asymco’s estimate that more than 550k Americans are switching from feature phones to smartphones every week – a rate that could see the US being all-smartphone sometime in 2015.

Meanwhile, NPD Group has data analysing the number of connected devices in US homes: 133m smartphones, 39m games consoles, 31.8m tablets, 16m connected TVs, and 183.8m desktop and laptop computers.

“The development of the shared screen experience, by throwing content from a smaller screen to the TV, is converging device ecosystems,” notes NPD. TVs may be ‘smart’, but their long-term use may still be as ‘dumb’ screens playing entertainment wirelessly streamed from smarter phones and tablets.