I think it's another "hump" we need to work through.
A lot of the problems at the moment with so-called age discrimination is lack of tech skills, as many people in their 50s and 60s didn't grow up with computers and so aren't really fully up to speed with modern workplace requirements as regards technology.
The following generation(s) will be more accustomed to "clicking" and apps for everything, so in 10/20/30 years as they approach retirement age, they'll be better equipped for dealing with the ever changing tech.
What I'm saying is that it's easier for someone, say, accustomed to using software on a laptop, to get used to apps on a smart phone or tablet. A lot of today's 50 and 60 year olds may not have been accustomed to using computers and other modern tech, so struggle to adapt to a modern workplace. Or, say a secretary or administrator having spent 20/30 years of working life dealing with paper and filing cabinets, etc., may struggle with the concept of a paperless office (i.e. the stereotypical person who prints and files all incoming emails!).
Obviously, not saying all older people will struggle in the same way, some will easily adapt, but what I am saying is that we've gone through a technological seismic shift over the past two or three decades, which has been hard for today's older people, that won't be quite so hard for the following generations.
Similarly with job applications as a lot of older people are accustomed to printing off a CV and sending it with a covering letter, whereas more and more employers are using online application processes where you have to enter data in online forms, followed by online aptitude tests, etc., all of which is alien to a lot of older people who can't navigate automated online application processes.