LOL - yes maybe not so much cameras and music equipment anymore.  I don't mean to say that Playstation isn't an important part of Sony, but it's not even a quarter of what they do.  I imagine that they make most of their money from their film and music side.

You do realize that the NES already successfully brought North America out of the 1983 crash almost a decade before the first PlayStation was sold in NA?  Nintendo went out of their way to package the system with R.O.B. to trick retailers into stocking it in their stores in a time when no one thought a video game console could sell.  The NES paved the way for the 3rd Generation to see a 125% increase in sales over the previous Generation.  Post North American Video Game Crash.  So yes, the market was steadily increasing.

For a while, Japan, North America, and Europe (which included Australia) were considered the three major territories for the console gaming market.  I placed "untapped" in quotes because before the advent of the PlayStation, console gaming as a whole in North America was still viewed as a child's activity while console gaming in Japan was simply another form of recreation for most demographics.  So the "untapped" market in this context was the young to middle aged adults who possesses a more disposable income in North America.

I think Nintendo made home console gaming standard, but Playstation was the next evolution that perfected the art. Had the N64 been CD rom and not pissed off 3rd parties with high fees, Square develops games for Nintendo and the history of gaming would have looked quite a bit different. Losing Square was a big loss especially in Japan, and while I stuck with Nintendo that generation and enjoyed every minute of it, you can bet I missed out on Final Fantasy, and Chrono Cross and didn't get to play them until much later on a high definition tv where the pixels looked awful. Had I been older at the time, I probably would have owned both systems.

No, it wasn't.  It only revitalized the console market.  I knew more adults who enjoyed Atari than Nintendo. 

No, but it did become the next big competitor to the company that made home consoles a standard for gaming, after SEGA dropped out.

Actually it is almost exactly a quarter of what they do.

Per FY2019, Games and Network Services Revenue was 1,977.6 Bin Yen (24%), while Sony's Total Revenue was 8,259.9 Bin Yen. As for Operating Profits, Game and Network Services was 238.4 Bin Yen (28%), while Sony's Total Operating Profit was 845.5 Bin Yen.

For reference, Music was 849.9 Bin Yen (10%) Revenue/ 142.3 Bin Yen (17%) Profit, and Film (Pictures) was 1,011.9 Bin Yen (12%) Revenue/ 68.2 Bin Yen (8%) Profits.

So Film and Music combine match PlayStation at 24% Revenue, however, they fall just short of PlayStation in Profits at 25% vs 28%.

At least in North America and Japan, the NES already did that. An EA exec recalled reviewing a list of top selling software back in the 1980s. They had to go through two pages of NES titles to find the best-selling PC title. 

I don't disagree. The PS3 was a much better device, with a better ecosystem, and a better games library than PS4. Sony just failed to gain any traction with it. PS4 is a far worse device, with a definitively worse ecosystem, that Sony stumbled into success with due to blunders from Microsoft and Nintendo. 

Luckily, the PS5 is looking more like a PS3 successor than a PS4 successor, and that could mean big things. This time, it looks like they will have the right price, the right features, and a lineup of 1st Party Exclusives.

One thing that hamstrung PS3 was that many of the big titles that had made PS1 & PS2 so successful where 3rd party, and they were made multiplatform when PS3 failed to launch on time, and meet sales expectations. That is not the case with the Titles that pulled PS3 through its later years, and have become major successes on PS4. If gamers want to play Uncharted, Horizon, God of War, The Last of Us, and Spider-Man, PS5 will be the only place to play. Sony has built an unrivaled library of exclusives, and now it looks like they are going to go back into the game of innovation and expansion, while maintaining and growing their already strong games library. 

Yes but now the Nintendo Switch will outsell the PlayStation 4