These basically already exist.  They're not Joycon style, but they hold your phone and connect via bluetooth.  I use one with my GEAR VR (without it holding the phone, obviously).  

I'm thinking that home consoles will still be the main place for AAA games for at least another decade. But, by that time, I think they will have completely merged with PCs. So, we may have boxes in our living rooms that look like consoles. But, they will be PCs. I imagine that XBox and PS will still be the brand names on many of those boxes, but I'm not sure if MS or Sony will still own them. Frankly, I was surprised that MS ever got into the console business to start with. They were almost completely a software company when they launched XB. Nowadays, they do a little more hardware. Still, gaming consoles seems like a strange business for them to remain in, once they get PCs into everyone's living rooms.

Mobile will completely replace handheld within the next 15 years, with the possible exception of dedicated gaming devices for kids (that would play the same mobile games, just without a full web browser, phone, etc.)

I think there will be plenty of options for gaming going forward, and their will undoubtably be some unexpected events over time as well. If we just break down Sony, MS, and Nintendo, here are my thoughts.

Sony

PlayStation will branch out to all Sony devices in time. PlayStation Store will eventually be the be on every Sony devices, and it will compete with Google Play, the App Store, and Windows/Xbox Store. Sony will set a new baseline every decade or so, making their games playable across, phones, tv, consoles, streaming, VR, and other devices. I expect we will be able to buy a more advanced PlayStation Console, Phone, TV, and such every year if we please.

I think the traditional console concept is dead, and Sony will use their exclusive games and VR software to push sales of all of their devices.

Microsoft

Very similar to Sony. They will continue to offer games across a full line-up of products from wearables, to high end PC. I think they will continue to release revisions, to all of their products, allowing the consumer to upgrade as they feel necessary.

Again, the traditional console concept is dead. Games will be playable on all Microsoft devices, and any device running Windows OS.

Nintendo

I believe Switch will continue to evolve for years. We will see the brand grow to other form factors, and they will eventually move to yearly refinments.

All in all, the traditional console cycle is gone. Being limited to one form factor is over with. Eventually I believe all maufactures will offer a streaming service, with older titles, so they can reach the largest audience, these services will eventually be available on all platforms. VR will play a major role in the future, but it will never fully replace mobile gaming or traditional home gaming.

The future of gaming is very bright. We will have grander experiences, on a wider range of devices, and people will be playing games from early childhood, to their very last years.

No room for that...

Instead:






http://robburke.net/projects/star-trek-hololens-biometrics-game/

Mobile chipsets, cloud networks, VR+AR, and hopefully brain machine interfaces replace them all within our lifetimes.

Call of Duty will get wierd looking but people are still addicted to it I see. Think it still has voice chat? Or is it mind chat?

Agreed, 100%.  The future is bright.  

As for people playing games through their whole life, that's not the future.  That started several years ago.  

Future would be Nintendo switch like.
Arm devices are growing faster in processing than x86. Next switch generation should be around ps4 levels. Very capable of playing every ps4 pro and Scorpio in 900 to 1080p, like ps4 and xbox one.

So, in future, 2gens from now, I see them adopting arm, and getting a switch like configuration for 1080 playable in a tiny screen, and a all power decide for 4k+, but in the same development engines.

I would say home consoles as they are now, last until 2030. After that, streaming will probably take over. That's not to say a traditional home console won't be available after that time, but if it is, it will be much more expensive since it will slowly become a niche product.
For console upgrades, I would hope they decide to make the "Standard" and "Pro" editions at the same time and launch them together. Use the same type of hardware and API, with one console being 2X-3X more powerful than the other. This should help greatly with more balanced sales and better support from devs for both systems.
Mobile will continue to grow, and all of the console companies will more than likely jump in at some point, but they will always focus on their home console, streaming, and online service first, before mobile (except NIN).
PC gaming will continue as is, but the future will probably lean towards streaming like consoles. High end PC's will probably also become more niche and expensive around 2030.
Streaming is in its early stages, but is mostly being held back by the old network infrastructure. This is going to take between now and 2040 before the first world is completely upgraded to a true fiber optic system. 2030 should be when streaming finally starts to become more of a "threat" to gaming as we now know it.
AR and VR will probably remain niche for quite some time yet. The main hurdles holding it back are wireless tech and GPU tech. The easier it is to wear and move around, and the more realistic it gets, the better it will sell. Over time the price can drop as well leading to a broader market. 2020 to 2030 will be an interesting time in this sector.