The option is limited, however, as once the PDF is saved to iBooks, the only export options you have are Email and Print. That said, this is still a definite step in the right direction for iOS. Archiving webpages will be much easier as a result, even if iBooks isn’t the most ideal option for storing PDFs.
Not only will users be able to save webpages to PDFs, but the option shows up in first-party apps like Notes and Photos as well. Being that it is a native sharing activity, it would seem likely that third-party apps would gain access to the feature as well.
That is interesting.