Okay, I agree with your post but this part in particular I've been wondering about...
When it comes to people spending so much time on the internet (as have I for the past several years) I'm not sure how well all of this spent time is supposed to translate into treasures in heaven. For all I know, all that time spent watching youtube videos and learning about the world could turn out to be in vain, and when I get to judgement the Lord might shake his head in disapprove that I squandered the time on earth granted to me. I feel like a lot of people would be in this position as well, and it's kinda depressing in a way.
Last year I spent too much time on Youtube, and playing video games, doing absolutely nothing of worth to God. Jesus one day told me I wasn't allowed to do that any longer, because my lamp was empty Matthew 25:1-13. It was a huge experience.
Be in the world, but not of the world. Separate ye. Do not conform to the standards of this world.
We aren't exactly supposed to be as involved in this world as most Christians are. We rationalize it, saying that we may use it to further the Kingdom, but that's not how He wants us to live.
We should focus on Him only. Whatever we do, we should do it for His glory. That doesn't mean that we come out of the world, but we shouldn't live like non-believers.
He has been so strict to me about this lately. It's not about going to church or preaching the Gospel all the time, but rather we are to do the things that edifies us as His children. We must focus on the eternal, not the things of this world. We must be ready when He comes back to bring us to Him.
So, yes, I think you are right to be worried. We all need to wake up!