Absolutely! Avatar is a good example, methinks. And as much as I love the original show, it was these changes precisely why I ADORED Korra and its depiction of how these changes affect the world. Personally, I thought that was what made "Korra" feel more grown up, more serious and all around wonderful.
And athough I understand why some people would see the games taking such direction a "death" of the series, I cannot comprehend it. It would only make the world more interesting, the endless conflict and drama and plotlines we could milk from this, the chance for this series to become something extraordinary - the possibilities are endless!
There are only so many ways in which I can express my agreement with your sentiment about unchanging faux medieval fantasy societies. There are so many of them that they blend together, become completely indistiguishable and we as a culture have become so desensitized to them that perpetuating this cliché can seems quaint, at best. Warcraft fans (myself included) survived the visual and technological evolution of the series, embraced it and ended up enjoying it immensely, and I think DA fans can too.
A bit of a necro, but I wanted to comment on this.
Evolving the setting is important, but I'm wary of large technological leaps. I actually think the technological lag is pretty well explained in Thedas. I mean, I don't see the ancient elves developing firearms, seeing as they could all use magic and employed it in everyday life. And Tevinter would want to avoid empowering non-mages. After Tevinter receded, well, it was a thousand years give or take between the end of Rome and firearms becoming widely used, and that's without Mages to fill the artillery niche.
There's also the name issue, that kinda time leap poses problems for a franchise called Dragon Age, an age set to end in sixty years.
Now do I want them to move to another section of Thedas to experience a new culture and hopefully never see Ferelden again? Absolutely. I'm crossing my fingers for Antiva, Llomeryn and Rivain in DA4, with a stolen Qunari Dreadnaught as a home base and hopefully a more down to earth story with plenty of political intrigue.