If you do more drawings like this [based on screencaptures with Sherlock in the dressing gown and this wallpaper], you'll be able to "merged" them all and make an animated movie and, in the end, be a decent candidate for next Oscars in Best Animated Short Film category
This is a brilliant idea for a series. Though I wouldn't be surprised if you were seeing that wallpaper in your dreams. Your art always makes me want to watch Sherlock again. You always manage to capture the feel of the series in your work.