Coulda, woulda, shoulda I reckon. Just shows how lacking in vision and courage the other manufacturers were/are.
It's kind of like saying that the athlete who constantly choked during crucial moments would have been better than anyone ever, if he hadn't choked constantly. But they weren't great. They choked. Every time.
Basically, they cut the market up into segments - consumer/low end and high end.
They assumed that 95% of everyone fit into the first category, and decided that 1366x768 would suit them fine, and as all the panel manufacturers worked together on this (they were fined for the financial side of the fixing activity), no-one had any choice. They then produced the "high end" stuff just like they did before, but bumped the price up, because it was now a niche product.
It was a very capitalist thing to do...
This is leaving out work by The MS founder who while he has been a massive tool is now with some of the other tech billionaires on the verge of getting rid of malaria. The Google founders donating the use of their personal jets to NASA for research and the huge amounts they have both put into education even if it has not worked out as well as they hoped thanks to unforeseen barriers.
Question is what has Apple or their lorded founder done, build some services that are locked solely to their platform, fork a bunch of tech so that they contribute back comparatively very little given their dependence on it to OSS and buy a shiny boat/car lease deal.
You are right that the other companies would charge for it too but as far as I can see they may actually care enough to give a little back rather than hording it like scrooge mcduck in a tower of gold.
You must not remember the many, many years of attacks against open source by Microsoft. I was a very early adopter of Linux back in the days when you had to first compile it and I remember well their "cancer" comments and war on everything open source, including their infamous "235 patents" lawsuit. Here's a (very, no microscopically small) sampling:
Why Microsoft is wary of open source - CNET News
"Microsoft Attacks Open Source" Want to know why? [Archive] - SpeedGuide.net Broadband Community
SCO v. IBM - Wikipedia, the free encyclopedia
Linux Foundation to Microsoft: stop secretly attacking Linux | Ars Technica
Dead and buried: Microsoft's holy war on open-source software - CNET
Today, Microsoft tries to pretend they like Open Source, but it's only a ploy. If you can't beat em, join em. All the while looking for for a soft spot to stab them in the back of course. Need proof?
Opinion: Antitrust complaint against Android is an attack on open source | Ars Technica
Linus Torvalds: I will not change Linux to “deep-throat Microsoft” | Ars Technica
Hidden Costs of Open Source
How Linus Torvalds Helped Bust a Microsoft Patent | Enterprise | WIRED
Now, let's consider Apple. They have actually been more supportive of OSS and generally more respected by a country mile by the OSS community than Microsoft has been. For a good reason. They've contributed far more and attacked far less. Of course, it has been somewhat self serving. Anything that damages Microsoft was good for Apple for a long time and OSS was considered a threat by MS so Apple fed their fear. Besides that, Apple doesn't make money selling software, so OSS was no real threat to them anyway. That's the case for Google, Amazon, Facebook, and others you mentioned - none of them make money off of software, so OSS is no threat. To Microsoft though, software was their bread and butter.
Symbiotic: What Apple Does for Open Source — RoughlyDrafted Magazine
Apple's Relationship to Open Source
As for Steve Jobs philanthropy or lack thereof, it appears the criticisms on that front were misplaced as well. Maybe he was following the advice of Matthew 6:2, or at least just disliked making a big show of helping other people out. It's hard to say what anyone's true motives are, so it's wisest not to try to judge that.
How Steve Jobs and his wife secretly gave away TEN OF MILLIONS of their own money to charity... even as critics accused him of not doing enough | Mail Online
That's enough please - you are ALL descending into "he said" and "I said"
Play nice and stick to the original question
p.s. In answer to the OPs original question - yes there are screens available that are better than those found on Macs. But, they are not common, and not produced with the consistency of Macs (or iPads) by any manufacturer. At the moment.
Sorry if it came over as just aimed at you. Will edit