Why has the progression of smartphones been so fast?
The title says it all. I have a speech I have to do for school and this is one of the points I have to cover and googling didn't do much for me.
What has enabled this fast progression technologically? For example when looking at the Galaxy and the S 4:
Galaxy S: 480x800 and 512mb RAM
Galaxy S4: 1080x1920 and 2GB RAM
All answers appreciated.