While the author of the quoted paper has a right to have is opinion, I do not agree to his opinion for the following reasons
1. Almost all client server applications store data in the server
2. Server side scripting dos the major job of computing. It needs resources any how
3. Thin client (No CD, hdd, USB etc) has lower maintenance need. This also improves security.
4.Administrators need to concentrate only on server. Software updates/ Patching restricted to server.
5.One good example is the Indian Rail Reservation system which perhaps the largest passenger reservation system works on it. This is in itself is a proof is utility.