Startup Idea : Better Product/Service Reviews

Currently, all customer reviews are very simple - name of the author, date of review, rating, and written review. This is helpful, but it could be much better. The problem with these simple reviews is that you usually don't know anything about the author, their expectations, or their previous experiences. When a 30 year old techy is searching for reviews on a laptop, a review written by a 60 year old mechanic doesn't mean as much as a different 30 year old techy's review. Similarly, a college student's raving review of a luxury hotel is probably less useful to a millionaire than another millionaire's review. My idea is a review website that shows you reviews and ratings by people that match your demographic.