That is an interesting question. I do not believe that because I have a computer, a cell phone and big screen TV set gives me an advantage over those who do not.
Having gone through two years of unemployment before drawing Social Security, I would offer that the ongoing advances in technology is having an impact.
At my last job, my primary role was Public Relations. I was also in charge of all IT matters. Thus I kept up with the technology that was used in my office.
When I was job hunting, I found that employers are expecting IT people to have all kinds of certificates, be able to program, etc. I was behind the curve, and adding my age to it, I was unemployable. Had lots of interviews because my resume was good, but they were courtesy interviews.
So to answer your question, I would have to say that indirectly technology is widening the gap, only because the current crop of hiring managers have no faith in people being able to learn, think you are over the hill at 55 and do not want to spend any time or money training you.
I worked at a dept. store for a short time. The cash registers were "old school" but were a problem for me because I did not go to that old school. However, I knew how to handle customers. I could had kept the job, but a new department manager came in and had visions of taking over the store. I left. He called in sick one day, was out for a week and then called said he had another job.
So, you have to tie in technology, ethics and patience to determine why the gap is increasing.