You may be right, but I'm not sure your comparisons are entirely accurate. Not least simply because I don't know many old-folks who inherently hate new technology as it is. Most of them I've met are/were simply fascinated by new things - whether they understand how to use them or not.
As for 3D Technology, kinect, etc. I would first like to point out that I think you're generalizing quite a bit with the whole "you all hate these" stuff. I don't enjoy all of the 3D gimmicky stuff - but I don't hate 3D as a whole. I dislike my 3DS because it's bloody worthless and I have never gotten it to work properly, and even if I did, THAT is just a gimmick. It doesn't change the gameplay or story-telling or anything in any way.
On the other hand, the AR stuff on the 3DS is pretty cool, and that COULD be useful in many ways perhaps. Maybe using the same kind of technology to implement HUDS in military/civilian glasses/helmets, etc.
In regards to the 3D TV's - I don't hate them, I just don't feel a need to purchase them until they're both cheaper, and don't require stupid-looking glasses. However, I definitely don't hate them outright. I hate how they're being abused as gimmicks to increase prices on movies. However, it CAN be done amazingly - look at Avatar. Whether you enjoyed the movie's story or not, I will simply not believe you if you didn't think the 3D was fricking AMAZING. I think I watched that movie in 3D a dozen times while it was in theaters - and it was just so cool.
Bah, I can't keep a response flowing with a single thought unless I have an outline written up ahead of time, so I'm going to end this now with a final thought before it gets too... all over the place.
In regards to your question: "Do you think gaming will becoming something that only old people enjoy" I'd have to say no. Once again, Gaming is a pretty general term, but I don't think any form of gaming will ever be "just for old people". Gaming with cards, boards, or even just the human body itself, have been around for as long as those things have existed. But you wouldn't say Black Jack, or Uno, or even Go-Fish, are only for old people would you? Nor would you claim that Monopoly or Dungeons & Dragons are only for old people.
Same thing with video games - I'm going to ROUGHLY guesstimate the first Video game was sometime in the 70's (without looking up any dates - so feel free to throw in a correct date if you want to), probably Pong or something similar, and point out that Video games have only changes and improved (in some ways, depending upon who's being asked/told) since then. As with any form of entertainment, it just changes with each generation - it doesn't really get stuck with any previous one.