I agree with the bold however everything else I have to disagree on.
Not being at a show does not distinguish the rumours of a PS5 console, in fact it only fans the rumour flames even more.
There are also many rumours flying around that games like TLOU2, Ghost of Tsushima and Death Stranding etc are PS5 games (Possibly cross platform games, similar to Zelda BOTW with the WiiU and Switch launch)
Sony's 2018 show was a disappointment, and it probably did nothing but slightly tarnished the PS brand. Considering MS has the power edge now and majority of Xbox and Nintendo mistakes have been corrected with the S and X machines and Switch consoles, there's nothing really else they can do but showcase the same games we got in 2018 again.. maybe they could show case some low budget or Indy games but that's just making them look flat compared to what Nintendo and Xbox will bring to the table in 2019. MS have 14 gaming studios now with majority of them most likely making announcements of there future plans and there next projects next year.
This sounds more like Sony retreating from the E3 battle rather then showing up there competitors. They will be back and they will have a lot more to show but right now what's next? I feel the PS5 is even more closer than we think due to this interesting E3 avoidance method.
If TLOU 2 had to be the PS5 title, we would not have had two consecutive reveals of the same in E3 expo. One being the announcement and the other gameplay, not to mention the extra ones showcased during the other press conferences. I do feel Naughty Dog would soon announce the release date by q1 2019 for a q4 2019 release. PSE still remains the big card to me imho.