Actually already a few months ago has emerged the issue will appear PlayStation 5 (PS5) on the market, but of course the issue does not appear without a source that can be trusted, like there is smoke there must be a source of fire.
PS5 started discussing lately, because the Sony also did not want to lose with the competitors-Microsoft with its new console, which must have hit the PS4 Pro well both in terms of specifications and slim form. I think the Sony was the first to raise the issue of the emergence of the PS5, the issue was deliberately spread to get the gaze from the various mancam users on the market, whether many people agree or disagree, whether a few more years is a great time to release PS5 on the market ?, Certainly as big companies like Sony, they want to know the surevei results and responses from the issue.
In fact, with the emergence of Xbox One X and PS4 Pro which is a new marketing system in the release of a generation of console, antiquity party Sony or Microsoft just issued a Slim or Compact version of its console generation, Issued a console with a higher specification but not too high so it looks very gig.
I think with the emergence of PS4 Pro and Xbox One X this makes the age of PS4 / Xbox was still long, considering the new PS4 Pro October 2016 and Xbox One X new Spetember 2017 later, of course, if you want to announce there will be a new generation console, Inappropriate time because it is too fast. But actually for the age of PS4 itself has stepped on 4 years, and the old age of the PS3 is 7 years so yes the possibility within a period of 1-2 years more news emerging PS5 will be published.
Moreover, currently the PS4 has dominated the home console market and won the "console war", with sales of about 60 million units, while Xbox One is only estimated 26 Million Units, should the Sony will stay and enjoy the current conditions, but of course remain vigilant, Sony wants See what sales Xbox One X will sell in the market, if it runs successfully, if indeed successful may be the Sony will bring more serious news about the PS5 as a "distraction".
For info aja PS4 Pro release with retail price 399 $ (Rp.5.586.000) and in fact until Indonesia touched 7jt price while the retail price of Xbox One X is 499 $ (Rp 6.986.000) until Indonesia want price of 9 million? Because the console market for that price in my opinion does not make sense.
I think 2019/2020 is a great time, considering some exclusive PS4 gameS that will still release in the next 2 years. Let's see what the development of this console, considering the development of hardware that is getting faster and cheaper.