Too many websites

I found this tweet the other day from Chris Dixon to be quite interesting:

The  stunning speed with which new websites get traction and takeshare from other sites actually makes them all less valuable.”

I have about ten bookmarklets now in my browser. 4 are for reading/notes (Evernote, Instapaper, Reading AM, Delicious) and 4 are for ecommerce type activities (Amazon, Svpply, Pinterest, Swivvl). Its completely impossible to choose which to use if you do decide to use one. Will be interesting to see how they all play out.