Maybe. I missed the Beatles on that first run (wasn't born yet). Discovered them in about 1982. Through learning more about them, I found the Stones, Who, etc. In the early 80's I was having my own British Invasion which then opened up with other 60's artists that were great (IMO) but not british, including Motown, a good number of American artists and some from other countries. That then spilled into 1970's music where there were still some classically great (IMO) stuff to be found too.
What I think was so great about all of that classic rock was that so much of it sounded original. It didn't sound synthesized. It wasn't auto-tuned. They didn't have drum machines. Songs seemed to have a lot of variety.
Today's music sounds too similar to me. That classic rock diversity seems replaced by 2 or 3 producers over-producing, too much reliance on auto-tune, too synthesized... maybe even too formulaic. Of course, not every single song today is like that and there was some formulaic rehashing in the classic rock library too but I found plenty to really like back then and I don't find something comparable to that now.
Back then, they had archaic technology and today artists are relatively god-like in terms of technological advancements. Conceptually, given how much progress has been made in music-making technologies since then, I would think a Beatles-caliber artist would be able to make better music today than they could then. I can imagine taking a rMBP with Garage Band back to Pete Townsend or Queen or Lennon & McCartney or similar and they would have flipped out at what even an amateur can do today with free* tools.
So even if I try to buy into better technology breeds lazier creativity, I would think the huge advances of music-making technology should yield at least the same caliber of diversity and quality of great music-making. And I don't even buy the lazier creativity theory myself.
I'll concede that a second coming of a Beatles may be impossible but now many more people are equipped with the ability to create music than back then. So maybe we can't have another Lennon & McCartney or Zep or Stones, etc, but how about some wow, must-have hits from a greater breadth of music makers than existed back then. In other words, instead of one band cranking out 20 #1 hits, how about far more 1 or 2-hit wonders in the present? Where are they? The tools are so much better than any of the classic artists could ever imagine.
The internet provides a relatively free path for a great song from a nobody to get out there. Social media makes it pretty easy for a nobody to get heard and passed along to other sets of ears. If a nobody recorded a "Hey Jude" today, the path to mass distribution is not limited to trying to get a Studio to sign them. Between Youtube and Social media, it can cost nothing to set it loose and even find a following. A few modern hits from nobody have come up exactly that way. It seems there should be so many more.