Here are the sentences based on the cues provided:

1. I hope that language barriers will disappear in 50 years' time.
2. It’s important to be polite and respectful when you’re online.
3. My grandma spent 2 hours sitting in front of the computer to learn to use the webcam.
4. Most teenagers would rather chat with their friends online than see them in person.
5. How do you think people will communicate in the future?
6. They often have a video conference on the last day of the month.
7. Smartphones and tablets will get thinner and thinner in the near future.
8. Last year, he decided to stop using Facebook for personal communication with family and friends.