Microsoft enlisted the likes of Holly Willoughby and James Corden to promote Windows Phone in a handful of advertisements. In the above video we can see Corden running through the HTC 8X he just unwrapped. MSN reports that this is an unscripted walkthrough, which would make Corden a fairly experienced fan of the platform.
The team has done a solid job ensuring those who are picked for the job are well informed of all the features presently available on Windows Phone. We'll look forward to see more work from both Microsoft and OEM partners in 2013.