The announcement by FamilySearch.org that all of its 2.4 million rolls of microfilm have been digitized does no begin to herald the end of microfilm. I am told that FamilySearch.org still backs up its data to microfilm and will continue to do so for many years. In addition, those who claim that microfilm is dead are denying reality. For example, if you want most of the documents that are available from the United States National Archives, you need to rent their microfilm copies.
Here is a screenshot of part of the National Archives' microfilm collection that can be ordered online.eservices.archives.gov
The microfilm collection held in the Granite Vault and available in the Salt Lake Family History Library isn't going away anytime soon. Many researchers need to check the microfilm when the digital copies are unreadable or missing pages (yes, this does happen).
Additionally, the Brigham Young University Family History Library has an extensive collection of microfilms and microfiches that is not all available readily online. Don't expect to see all the microfilm readers in the BYU Family History Library disappear suddenly.
Unlike some old digital formats, microfilm is still usable and its life-span is 500 years. Do you really think that your present computer files will still be readable in 500 years? I have a bunch of old CDs and other storage devices that cannot be read by any device or program presently available. It is only through the process of migrating my data periodically to newer devices and formats that the files have been saved.
Let's not get too enfusive about the end of microfilm. Some of us are glad the technology is still available and usable.