There is NO question that these large format displays are going to impact the projector market.
As they should!
When you look at the price of a UST projector with a matching UST/ALR screen, the price is in the $4,000+ arena. Cheaper on sale at times, but the brighter models often come in above $5,000 completely purchased, not including the setup. At the end of the day, if you can only fit 100" in your space, then getting a UST projector vs. a 100" TCL for $3,000, the TCL will destroy the performance of almost all the projectors on the market in a typical family room.
Some people talk their stuff about a TV that size not fitting, blah, blah, blah. Same crap about electric cars vs. gas cars. WHO CARES!?!? If it doesn't work for you, then don't buy it. Buy what works for you. But that doesn't mean that it doesn't make sense for a lot of other people out there.
The "Doesn't fit through my door" claim is also really questionable as a 100" TV is in the same size range as a 4x8 sheet of plywood or drywall, which fit into most people's homes at some point to build the entire thing.
I've worked with 98" TVs for years now on the commercial side of things. You can stand them on end to fit them into elevators. They fit through doorways easily. Going up to 110" isn't going to drastically change things. The 110" diagonal is 8' wide and 4.5' tall. Yeah, it will fit through your door easily. But, it may struggle around corners and at that size may not fit for everyone. Which isn't the point.
The point is that once pricing for 110" is more in the $5,000 range, then it will be incredibly disruptive to the projector market. Especially the mid/upper level market.
My wife isn't going to be all that happy when I replace our perfectly good 85" TV with a 110" TV... but it will happen once the pricing gets where it needs to be.
But, just because it doesn't work for you, don't ruin it for everyone else by thinking the rest of the world is YOUR use case! That's just dumb, dumb, dumb.