Now Google Search engine changing search technique because it working on real-time content so it will change seo concept please reply !! http://www.google.com/realtime
Surely this feature has good application especially for fast transaction of information but the downside is the abuse in use mostly by some unethical SEOs. Google will not change their ranking guidelines with this new application so will surely not affect the fundamental SEO concepts.
Well the concept of SEO has always been changing, MOST of us just don't notice it because of the minor changes being implemented. We usually notice only the BIG ones.