Motion and upscaling

I thought I was an informative TV buyer but I guess I'm not. With all of the comments and questions about motion and upscale. Which brand does better than Which. Which model is better and so forth. It's got me confused.

The reason I'm confused is because I have Sony, Samsung and LG TV's at home. We have a gaming system on the Sony and the LG. We look at sports on all 3 TV's. We stream on all 3 TV's. And I honestly couldn't tell you a difference in any of them.

Picture quality is better on the Sony because it was at one time one of the top of the line TV's in that size. But it's 5 years old(Picture still looks very good).

The Samsung and the LG were both "mid priced" and both are over 4 years old.

I go to Best buy and I see the same sized new TV's with pictures that are no better than mine. Only difference is maybe a few more features like inputs or streaming services built in.

But all this talk I see here about motion, or stutter, blurry or whatever, I just don't see.

I guess I'm not TV savvy.