Most of the technology we see isn't out of the line for 2015, aside from the holograms which are even themselves "sort of" possible and similar styles of holograms have been used in the real-world.
And dialogue out-right states the events centered around JP took place around 20 years ago, so presumably the real-world passage of time between JP and JW is the same in our universe and the fictional one.
It really seems fairly safe that the sequels aren't entirely in continuity. There may be a Site B/Isla Sorna still without the events of either TLW or JPIII having "really occurred." Because it seems there'd just be a lot of discontinuity and questions if we accept the sequels as being in the canon. It's, again, hard to believe there'd be such support for JW following the events of TLW or that inGen would have been able to financially survive that incident that saw the deaths of dozens of people and great deals of destruction. Not to mention that Hammond was apparently ousted from the board with his nephew taking a position of leadership over the company.
JW seems to imply Hammond maintained some level of power in inGen (or the spin-off company that was behind Jurassic Park/World) as he wanted to re-establish the island park as opposed to inGen's desire to have it stateside. (Though the San Diego events may have caused them to not be able to get the necessary permissions to do that from the U.S. government forcing them to go back to the island idea.)
If JPIII did happen, in part or in entirely, it's possible that Jurassic World was being built or in development without it being public knowledge. Deals being made with the necessary Central American government(s), then the work it'd take to contain and control the animals while construction occurred to re-establish the paddocks and *then* they'd have to do maintain that control while they built the actual park. Oddly, they were able to apparently contain the original park T-Rex and eventually capture it and control it during construction of its own paddock. Interesting that they ACU (or the early version of it) could do that but they struggled to track, contain, and put-down the I-Rex. (Which, I know it was stronger, smarter, had more useful limbs and was physically younger than the T-Rex but, still. Controlling the T-Rex certainly wouldn't have been a walk in the park.)
I think it's best to assume the other sequels didn't fully happen as it can cause a lot of questions that cannot be easily answered. If they're really going for a new batch of movies it's probably best to assume they didn't happen unless directly referenced. The continuity of them being slowly stirred in as we get pieces of it. (Like Malcolm's book being in the "new canon" since we see it on the desk of the one control-room guy.)
I say again, I really liked this movie in spite of the flaws it had. The look and feel of the park before everything goes pear-shaped is just incredible. It just felt like a real park.
The movie's biggest flaw(s) are some narrative ones. Like why when the park guests are brought back to promenade they're not told to go to their hotel rooms in order to stay safe? Why are they all gathered on the promenade sweating in the tropical heat? Go in to your rooms with the A/C!
Watching some of the BTS information it seemed the director of the movie went into it with a good deal of love and respect for the original, which is admirable. It would have been nice, however, if the events that caused the crisis were thought out better; because they just do not make any sense.
It's bizarre that Claire, Owen, and the security guard instantly assume that the I-Rex scaled the wall of its paddock and ran off without anyone hearing, seeing or noticing, and the tracking-device needing to be used and activated to let them know where it was. It should be an "always on" feature. This is also the question of why the pterodactyls (and other flying "dinosaurs") didn't have similar devices in them to "shock" them when they tried leaving the aviary.
So, a lot of oddities in the operation of the park.
But, tell me you wouldn't love to go see that mosasaurus show!