Because it’s not a real split screen function. It’s artificially created, and designed for one thing - selling bluray players, and not “giving you a chance to decide for yourself.” The decision’s been made at that point. It’s being played off of ONE input.
Not necessarily. A split screen can happily show two different inputs on lots of TVs. It’s still unclear to me why doing this in a big box is inferior to doing it at a high-end TV store. I shop online, so I have no dog in this hunt, but I have been in ordinary big box stores and seen split screen comparisons with two different inputs. Looks like the image I linked.
As far as being designed to sell you BluRay, well of course it is. That what stores are for, big box or specialty.
All I can say is I have a 52" Sony and by changing inputs and sources I can go from broadcast TV to HD TV to DVD, to DVD upconverted to Blu-Ray.
There is a noticeable jump in quality with each change I described above.
You’re misunderstand what I posted.
I’m not saying to do a split-screen at a high-end store over a box store. I’m saying “don’t look at a split screen, because they’re bogus*”. I’ve NEVER seen a split-screen that wasn’t a contrived image playing from one input - usually a bluray player with a special promo disc from the manufacturer to “clearly show” the superiority of bluray over regular DVD. The result looks just like the image you linked.
*I specifically said “side-by-side” (i.e. two screens) and “switch between inputs” (one screen, copious use of the “Input” button).