Going to guess that this is probably the end of easily being able to download anything from OF. I just did a little digging into into DRM and widevine specifically, it basically encrypts the videos so that a key is required to view them. Without the key, you can't view the video.
I think it is probably possible in theory for someone to develop another scraper like digitialcriminals that is able to download these newly protected videos (but I don't know for sure, I'm no coder), but it seems like the problem is decrypting the video files once they're downloaded. Someone would have to find the encryption key somehow, and even if they manage to do that, OF will probably just patch in a new key once they catch wind of it.
So the long and short of it to me seems to be that this is the end of downloading stuff from OF for the most part. Really unfortunate for those that like to have ownership over the content they pay for, as well as people who use OF content in little bits to make their own nsfw compilations. I also imagine some creators might see a hit from this. I know I'm personally not interested in subscribing to anyone if I know I can't take their content with me after my subscription ends.
Guess we will all just have to wait to see what happens.