First online in 96, home connection with dialup in 97. We had a home network with a freecycled old 486 box sharing the connection!
Streaming stuff surprised me but I knew online shoppng would be huge. I think I did Christmas shopping in 1999 all online just to see if I could. And not only did I buy shoes online, I bought them from Boo.com!
Ideas I had and parked then saw someone else make a fortune from: solid state music players so they wouldn't skip (I was sooo excited when mp3 players finally arrived! My first had a parallel port!). And about 98, when me and my geeky friends were all registering domain names and putting up a few personal web pages: "hey it would be really cool if when you weren't online people could leave messages for you on a kind of "wall" that everyone would see"...
Future stuff...
Driverless cars ... why would they look like 2+3 with a boot? I reckon you'd have one person pods, couple sofas (or beds!), maybe you could hire one with a treadmill...or a disco! Family sized ones with a table to sit round... you'd just dial up what you need for that journey. Your luggage could go with you, but could also get picked up by a separate luggage pod that takes a cheaper, unscenic freight route while your family pod takes a nicer route and stops for a picnic.
And commercial transport would change as well - the plumber (assuming she's not a robot - roomba with a soldering iron) could cycle over for the exercise while her tools make their own way over.
Less travel in general though, more telepresence stuff.
3D printing, especially if the plastic can be reusable. Single use plastics you print, use once then throw back in the printer ready to print the next thing.
AI agents to represent you interacting with AI agents of companies. So instead of spam and adverts, you train an AI that knows what things matter to you. It exposes interfaces that marketing bots can engage with and together they negotiate: is it something you'd want to know about, what deal is available to you? Then your agent says - "hey, I think this is up your street, any interest?"