I'm a bit confused, as it seems several other people are in this thread - do you mean stuff that's in your living room now that would have amazed you when you were 10? Or stuff that amazed you when it was in your living room at the age of 10? I assume from your OP and the fact you're 39 that you mean the former, in which case...
1) 46" TV - no-brainer, we had a 28" TV when I was 10 and seeing the wall-mounted beast we have now back then would have been crazy.
2) All that space - my first house was not huge, and the living room in my place now is easily 3 times the size of the one from back then
3) Four dogs and three cats - back when I was 10 I wanted a dog more than pretty much anything. We had a spaniel when I was growing up but he died when I was pretty young (6 or so) and hadn't got another dog by that point. We picked up a jack russell a couple of years later but the house was empty without them. Never had cats before, picked up two of them a few weeks after the jack russell and one of them's still around, but the house was pretty bare when I was 10.
1) 46" TV - no-brainer, we had a 28" TV when I was 10 and seeing the wall-mounted beast we have now back then would have been crazy.
2) All that space - my first house was not huge, and the living room in my place now is easily 3 times the size of the one from back then
3) Four dogs and three cats - back when I was 10 I wanted a dog more than pretty much anything. We had a spaniel when I was growing up but he died when I was pretty young (6 or so) and hadn't got another dog by that point. We picked up a jack russell a couple of years later but the house was empty without them. Never had cats before, picked up two of them a few weeks after the jack russell and one of them's still around, but the house was pretty bare when I was 10.