then think a little harder...
Um., the answer is there right in front of you. The difference is that "Governments" have been doing this since the 60s (kind of), but what this is, is "Private Enterprise". That's the exciting thing. It looks like they have found a way of doing this profitably at a fraction oft the cost of what government was doing it at (read that anywhere before).
When big business has worked out a way to make money out of something, then the pace of innovation accelerates accordingly. I believe that space exploration, and of more immediate relevance, space exploitation has just got a huge kick up the backside, and is on the cusp of expanding rapidly (I was going to say "take-off").
I also believe that I will now see full scale asteroid mining and associated habitats in my lifetime (I'm nearly 40).
If you still don't get it, go and read just about any science fiction book ever written...