I think, out of this entire thread and whats been mentioned so far, cooking is the only thing I can agree on. However, I don't think technology is necessarily at fault for it, I think people are just too busy these days. You have a lot of people who work two jobs and have a family, they don't have time to sit down and learn to cook. Technology has just made it easier to handle the lack of time.
I personally love to cook, I prefer it over microwave meals, cause fuck those. The only microwave meals I have are ones I made myself. Ex: I have 4 sets of breakfast sandwiches I made from scratch that I can throw in the microwave at any time. Generally, if I'm going for quick makings, I just get a bag of tater tots and fish sticks from the store and use the oven, cause its better for you and tastes better.
GPS? I think its a great piece of technology. Do people abuse it? Fuck yes. I use my GPS to get me to a new spot once or twice, just enough for me to learn landmarks and streets. Once I got it down, I never use the GPS to get back there again. However, utilizing GPS to avoid traffic jams? Saves gas, saves rage, saves money.
Handheld video games have come a long way. Back in the 80s and 90s when I grew up, I could possibly agree that portable video games were bad for kids, but only if excessive. Video games in general improve hand-eye coordination, help kids focus, and keep their imaginations active. They're even better now with games like Brain Age and Big Brain Acadamy, where the game is giving the kids something to learn. I think the blame should be on how much parents are relying on handheld games, TV, and other such devices to do the parenting for them than the devices themselves.
In response to the topic? I can't honestly think of anything I miss. I have all but done away with physical media (gaming is the only thing that uses it). I don't have a land line. I don't like snail mail. I do my own cooking, that hasn't changed. I enjoy a GPS a lot more than trying to figure out a route and remembering it. I love my slacker account vs a CD/tape. I don't miss standing in lines for buying items. I don't mind reading books on a gorilla glass/ink screen.
If I had to pick one thing, perhaps I'm a bit off-put by the upcoming push for cloud technology. I know its coming and I know its what will be the way thin clients are done, but that doesn't mean I'll have to like it. I prefer to have my applications and data local thank you very much.
Jam it back in, in the dark.