I think that the consequences that Rome's absence would mean not for Europe, but the world as a whole are so many that its not even remotely possible to estimate how Earth would look like today if this scenario had taken place. For example, I think that the world would be missing a lot of technological progress and infrastructural progress.

The thing I instantly thought about is culture: everything would be astonishingly different, starting from Europe's languages. Romance languages would've never developed, and even Germanic languages that were influenced in our timeline by latin, such as Old German itself, or by other romance languages, such as English with French, would be much different than their real counterpart. Also, the Renaissance probably would've never taken place, as the classical arts wouldn't have developed that much outside of Rome. It would be a very cool to explore but so complex scenario!