VR has absolutely nothing to do with that process, the ability to control brain functions has no basis in virtual reality, that is actual reality and would install real knowledge into a brain to be used in the real world.
VR is a joke, we've been told through science fiction that VR means getting to play out the life of say Bond, in complete safety, or being a race car driver, doing everything you have never done but wanted to do but with no risk, no danger.
The reality is, it's an image in front of your face. Sit in a literally pitch black room 2 ft in front of a huge tv... that's VR. It's like motion control games, moving a controller in air isn't the same as punching a real person, there is no physical feedback, there is no touch, no taste, no smell, no reality in VR.
What sets the Matrix or the holodeck apart is they provide for each and every sense, either creating a real object and letting you touch it(holodeck) or generating the same electrical impulses in the brain that would make you feel exactly the same thing. VR, as it currently stands, provides a screen, nothing more or less, no touch, no real movement, no interaction.
VR has come and gone, along with 3d screens, for what 40-50 years time and time again. A helmet mounted screen is still a screen, it's no different to a tv just much more convenient to have a smaller screen on a helmet and block out the space around it that actually have a giant room completely blacked out with a monumentally large screen and sitting incredibly close, aside from that there is no difference.
VR is playing off the concept that a helmet screen somehow is a step closer from a existing screen to a holodeck or Matrix like simulation of life.
Until we can control brain impulses or generate a real world experience, VR as we call it, is a gimmick and almost entirely pointless.