Nowhere do I see in the list the requirement that the handgun be innovative as the sole, or even primary, reason for it being included.
If that were the only requirement, or the primary requirement, the 1911 wouldn't make it, either, to be honest.
The Model 10 is on the list because for the better part of a century it was the standard by whcih civilian and police revolvers were measured in the United States. Additionally, it introduced the .38 Special cartridge, which is still a touchstone standard cartridge for millions of users.
The Model 10 was also used heavily by militaries around the world, either as a standard arm or a substitute standard, and has served in one form or another in virtually every conflict since 1900.
Another mark of the impact that the Model 10 has had is how many copies have been made by manufacturers around the world, from blatant knockoffs by Spanish manufacturers to Rossi to Taurus.
Yeah, the Model 10 deserves a spot on that list.
As for the other firearms on that list, as I noted above, I'm not sure that I'd include the 1911. It had its day, but it's been surpassed, and it's not had the worldwide impact that some of the other guns on that list have had. But, that's just me.
I'd swap out the Model 29 for the Model 19, and I think I'd be inclined to replace the Model 60 with the Detective Special.
The Model 41 and the Ruger Single Six? I just can't get behind those at all.