The PS4 built off of what the PS3 laid the groundwork for. The second half of the PS3 lifespan became known for how high quality its exclusives were like Uncharted, TLoU, GoW etc. Sony stated early on this generation that around a third of all PS4 owners never owned a PS3. It's a big reason why something like TLoU Remastered sold more on the PS4 than on the PS3. People heard all the praise for it and finally got a chance to play it now that they'd moved to a new console. People knew that if they wanted to play those exclusives then they needed a PS4. And Sony's built off of that with Guerrilla having their break out game this generation. Insomniac made the biggest game of their history, along with Rachet being more successful than previous entry. And even SSM had their biggest success with GoW 2018.
This greatly disregards the fact that the PS4 launched as the cheapest console for AAA multiplats without bad PR coming from how to play and/or share games. Sales of PS4 exclusives definitely benefited from this.
Aside from that, anyone that pays attention to PS knows that a significant part of its revenue comes from PSN. And by significant, I mean that PSN alone last year made Sony more revenue than Nintendo's total revenue for the year. If you don't need to own a PS anymore to play their exclusives, then you don't need to be subscribed to PSN. Yes, games like FIFA, CoD and NBA sell a lot, but those exclusives are what keep them locked into the ecosystem in the first place. Uncharted 4 was announced before the PS4 was even announced. So it's a great example of a huge game that people knew was coming even if it wasn't available at launch.
Many PS4 exclusives are single player experiences that many love, but don’t find much of a reason to go back to very often since they’re single player. What keeps them locked into the Playstation ecosystem are the games that are heavily online, pick up and play, and get updates to stay fresh year around. Those games really don’t make up much of the PS4’s exclusive lineup. Those games are multi platform, and there are literally millions of PS4 owners that use the system to mainly play multiplats.
Exclusives that aren’t on other consoles are definitely still important, but the majority of console gamers simply want good, popular games on a regular basis—regardless of if they’re exclusive or not. Comparing the sales of the Wii U to the Xbox One during the 2013-2014 period pretty much show this even though the Wii U (at least in my opinion) had a far better exclusive library at the time.
The way that games come out on a regular basis is from there being gaming platforms with many players. The chance of this happening becomes lower if games remained locked to $500 consoles that don’t have decent sized user bases until ~3 years after they release. It’s not sustainable these days.
Look at the library of the PS4. Take away all of the multiplats. The number of true exclusives are FAR less than the system’s predecessors. This upcoming shift is really the only way for these companies to go.
_________________
Yes it is. It’s a similar experience/product. And how would having a weaker exclusive lineup not hurt a console? I mean that’s pretty much self explanatory.
The top selling console games on PlayStation and Xbox every year would look very different if console gamers truly hated using their consoles to play games that are available on PC. There’s more to a console’s success than just exclusives. The Wii U (a system I really enjoyed during its time) showed this really well. Far more factors that come into play this day/age.