OnJava.com have a great article about where the web and webpages as we have known them up until this point are heading and how web technologies are evolving.
Web2.0 is not any one or a collection of technology standards, but rather an evolved (and evolving) way of thinking about how the web can be used to achieve goals. The changes are subtle but noticible. In most cases Web2.0 encompases how evolving web based technologies are being used to enhance the user experience on the web, with the trend towards collaboration, sharing and community driven sites and community interaction.
For example, mid-90s personal web sites were ‘the thing’ for self-promotion and telling the world about yourself, your hobbies and your cat. Mid-90s personal websites were typically static sites. Today, ‘the thing’ for publishing personal information is the weblog, or blog as it has come to be known. Blogs are now dynamic, growing and living sites, regularly updated with new information as the author updates it. The end goal is somewhat similar, but the use of the internet and web technologies to achieve it has evolved.
This section below is taken from the article “what it Web 2.0” on OnJava.com site:
Web 1.0 Web 2.0
DoubleClick --> Google AdSense
Ofoto --> Flickr
Akamai --> BitTorrent
mp3.com --> Napster
Britannica Online --> Wikipedia
personal websites --> blogging
evite --> upcoming.org and EVDB
domain name speculation --> search engine optimization
page views --> cost per click
screen scraping --> web services
publishing --> participation
content management systems --> wikis
directories (taxonomy) --> tagging ("folksonomy")
stickiness --> syndication
In most cases you see that the goal has remained the same, but the evolution of technology has allowed the goal to be achieved in a different way taking advantage of the new technology.
This is an excellent article and well worth a read.