I have been planning to learning and follow some push techniques. So I found all the above for the purpose.
I am asp.net professional. Now SignalR can be used here and seems the strong candidate for my task.
I studied the Nodejs and actually liked this. I think it seems like jquery to me. It seems like it is going to be huge.
On the other had I think I should go with much more and official standard of only to learn Websocket and forget the rest because just like asp.net-ajax experiment that now seems to be replaced with jquery, SignalR also seems to me the same.
Websocket suffer the browers implementations issue and I am not sure will this issue be overcome.
Can someone give me suggestion where to start and get busy for the coming 10 years. :)