Technology is advancing. 20 years a go it would be inconceivable to have a device the size of a raspberry that can sing you 1000's of songs at your will. 100 years ago a system of fibre-optics linking the entire worlds information would be a thing of stories.
On top of that, war. World War 1 was the second worst war (in terms of deaths and damage) to ever happen, and brought new technology. The first is of course World War 2 which introduced lots of new weaponry and ultimately ended in the discovery of fission as Hiroshima will tell you.
And luxuries, at this rate fossil fuels will run out in the very foreseeable future unless we do something, but by not doing anything we give ourselves amazing lifestyles with computers, televisions, music, light and heat in one room. Maybe we don't do anything and people look back and think, "Wow, I wish I lived then". Or maybe we do something along the lines of Buzz Lightyear's quote in the original Toy Story where we "discover crystallic fusion". In which case we'll probably keep advancing at a faster an faster pace.
In conclusion I do believe we are in a golden age, in the year 200BC nothing much would haver changed by 100BC. But in (around) the last 100 years we've perfected Flight, Fission, Fibre-Optics, Genetic Engineering, Automatic Weaponry, Rockets, The Internet, Space Travel, Satellites, Advanced Radio, Mass Media and the iPhone 4S.