Yesterday we took a look at a screenshot from MS’ Windows 10 keynote. This morning T.W. tweeted that he thinks these (including that big phablet/tablet) could be Windows’Phone’ 10 too.
The first two definitely. The one on the right might be what RT used to be? Note the three buttons for WP of which the biggest has on screen versions.
It also has a gradient wallpaper against those tiles.
Note that the homescreen content is identical on all devices but they’re just scaled differently.