Does it mean Google merge both mobile pages and website pages together in the regular SERPs?
Other than I rank for that specific term however just searching for .mobi sites in the regular co.uk SERPs I see there is mytraveline (buses), Barclays (bank), TheSun (newspaper) and loads of others. How and when G decides to dispaly them I have no idea.
My .mobi sites are strictly compliant however I'm going to be converting them soon to a hybrid version which automatically displays the content according to the browser/screen size and also automatically reduces images to fit etc but at the same time looks like a regular site on a laptop or PC monitor.
I didn't develop it, I found the template for sale for about USD 21. let me know if you want their details.