I agree with the point that Google is the ambassador of web 2.0.  The internet  has evolved from just a simple place for viewing, to a market for buying and selling of goods and services. Back in the day, it was all about Netscape, but ever since Google arrived on the scene, things have been different. For web 3.0 there will need to be a revolution of either the technology used for viewing or accessing the internet. I see Web 3.0 coming around 2020 when technology has evolved quite comprehensively