All hypothetical but what if 2019 had a full year of ps4 at $199 and pro at $299 before a price cut to $249 and a super slim ps4 at $149.
You'd also potentially have the likes of gta 6, the last of us 2 and death Stranding plus obviously more releasing that year.
If the ps5 was nowhere in sight and was targeting a holiday 2020 or 2021 launch then 2019 could be huge.
You could also potentially see a much cheaper psvr sku for something like $199. A lot of potentials above but if the stars aligned, then who knows.
Rockstar is not the type of company that releases a game every year. No chance for GTA VI this generation.