Where are the lines blurring? You've got a client and a server, and the two are sitting on different machines, communicating only via HTTP requests. The fact that they can be written in the same language is nothing too special; you can do the same with desktop apps, and have been able to for ages.

If you could blur that browser-server line, I bet you could do some impressive things. Bonus points if you manage to do impressive things without opening up lots of security holes. :-)