You guys are getting a little carried away I think. First of all, I agree that box office doesn't need to be the sole motivator for theme park attractions. But one weekend is too early to tell if something will last. I mean Disney jumped the gun on Avatar and that was a few months after that had finished its theatrical run. So this whole conversation IMO is happening a couple months too early.
But for arguments sake, let's say JW does make a billion, has huge cultural relevancy, continuously strong merch sales, etc...you still have to ask if Universal benefits at all from retrofitting JP with JW. Thematically, ok JP doesn't make sense anymore, but did it really make sense in 1999? After Lost World had taken place do people really want a Jurassic Park in Orlando (that same issue happens with JW but whatever). A theme park doesn't have to be ridiculously canon, it just has to establish a familiar place and do it well, which Jurassic Park currently does.
Then you have to run a cost-benefit analysis to see what all that re-theming would actually do for them financially. River Adventure isn't going anywhere, they could revamp it but would it really make a difference and would that bring in any more turnstile clicks? Would tearing down the Discovery Center for a more JW-style building really be justified financially? The only thing they could do that would make sense is add a new ride, but that would be tricky. Even then, there would be no reason to update the WHOLE island around a new ride. It just wouldn't be beneficial to Universal.
JP as it is now is fine. Its an Orlando branch of the theme park chain. That's good enough if you ask me, and the extensive aesthetic updates that you'd need to do to bring it up to Jurassic World standards wouldn't bring enough ROI to make it more appealing than just leaving the island largely as it is. Minor upgrades, I can see, but JP is doing fine enough in its current state to deserve a whole facelift.