Just for clarification, is the question: websocket vs silverlight?
Cause websocket is based on HTML enabling the web browser and web client to talk with each other live. Does this mean that developers cannot use Ruby/Python in client side, but only Javascript?
If I use Silverlight, then it seems possibly for developers to use Ruby/Python on both sides right?
So in short:
Websocket => Javascript
Silverlight => Ruby, Python, Javascript etc
Is this picture correct?
WebSockets consists of parts: server and client. The server could be written in any language while the client is intended to be javascript. Using Ruby/Python on the client side is not possible unless you write a browser plugin capable of running this code (the way Silverlight does it).
Silverlight is .NET meaning that you could use any language capable of compiling into MSIL (C#, VB.NET, IronRuby, IronPython, ...) which will run inside the client browser using a plugin that needs to be installed.