I dunno, I'd LIKE to believe this but...
I had an experience with it fairly recently. I go on monthly excursions in a local state park during the summer hours of DST with a group I'm involved with (not a photography group, I'm the only one who shoots many photos.) Every year during the holidays our tradition is that we have a year end party, and it's become tradition that I do a slide show. This past year we had an unusual amount of rainy weather which limited the amount of slide film I shot. On those days I didn't take a film camera for that reason I still took some photos with my iPhone, an iPhone 6 so a recent model.
To round out the show I showed both slides and my digital shots via my home theater projector, an Epson Home Cinema 2030. From a normal viewing distance, while the two sets looked a bit different, I'd be hard pressed to say one was clearly better than the other. The only thing I'd have pegged as "wrong" with the digital shots is that they were pretty uniformly a bit over saturated for my tastes, but that's entirely a matter of the algorithm in the camera and easily fixed with any image editing software, I just didn't have time to bother. It's also a matter of the slide films I shot, which were E100G, Provia 100F and Provia 400X. I suspect Velvia would have been considerably more saturated than the digital shots. Now if you walked up close to the screen, closer than you'd ever do to view the entire image, then yes the difference was obvious with pixels and some artifacts visible in the digital images. But from back where they were intended to be seen when projected to that size - I'm not so sure.
The last thing I want to do is turn this into another digital comparison thread. And there's also the point that a 35mm slide projector can be had very, very cheaply these days and not that many people have, or care to shell out the money to buy, a really good digital projector. I paid about $900 for mine not counting cables, mounting, the player that feeds it movies etc. and I would never have done that just to show still frames. I bought and installed the system for movies and just pressed it into service for the still photos. The price on that model has come down in the nearly two years since I bought it, but only by about $100 so it's still a far more significant purchase than a slide projector which can be had for well less than $100 now.
I love film, and I'll continue shooting slides on those trips as long as slide film is available (and the weather allows! Yes, I could buy a Nikonos or the like but I'm not going to just for that.) But that's also because it has other advantages. If I wanted to, say, make a (coughcough about how I'd have to do it now with Ilfochrome and Type R gone) large print from one of those frames I suspect the 35mm slide shot on Provia 100F or E100G, and possibly the ones on 400X as well, would blow away anything I could do with those iPhone shots, especially if I did any additional cropping. The slides will last a very long time if I store them carefully. The digital shots are backed up on my computer but really just on the phone and computer and who knows if I will still have the files, or even be able to read them, in 20 years or more? I love slide film I'm just not sure that "it's so much better projected" is a reason why.