Would you like to see the series go forward a bit in terms of what technology is available within the world? This could be things from the technology of cities, power sources (IE use of Steam,e tc) to weapons , means of travel, etc.
Keep in mind, with TES their technology doesn't HAVE to be like our world, it doesn't have to mean they discover/use guns or have cars or anything of the start. The world can evolve and develop their own unique technology along the way with whatever the develops decided would fit/be right for the world.
Personally, after playing the games while I enjoy them, the worlds themselves have a bit of the "been here done that" feeling, which isn't a bad thing but I think it'd be nice if we saw the world starting to evolve in it's own way. Perhaps not in Skyrim, but in the future.