You might begin with some of the sites here:
What kind of computer literacy are you considering? Word Processing? Spreadsheet? E-mail? Searching the Internet?
At any age, you need to be aware of the potential usefulness of learning about the computer as balanced by the expenses for equipment and sevices and effort needed in terms of learning new procedures. As computers became more user friendly and computer courses are more readily available, more people (65+ or not) will become literate.
Two decades ago, it took others 3 years to first convince me to start using a computer for word processing. In the years since then, I have expanded to spreadsheet, database, e-mail, making my own signs and greeting cards, searching the Internet and making family movies to record on DVDs. I have even taken courses to develop my own web site.
One current use for 65+ is e-mailing children and grandchildren living a great distance away. Now with Skype, we can even talk face-to-face in real time! The grandchildren can also show us 65+ people the projects they have done.
I hope this helps a little more. Thanks for asking.