Question: I develop asp.net websites, and I read about cloud computing, windows azure, etc. But in the end, I cannot see any pratical reasons to change/move/etc my services to the "cloud".   
What the benefices?

Cloud computing is some kind of "evolution" of web farms?

Thanks, and sorry my ignorance....

Answer: 
I think the number-one reason is the level of dynamic scalability that is offered.  

Then I would say the amount of redundancy, that is typically offered.
Because you can use one buzzword more to impress your clients. :)

Honestly, if you don't know it you probably don't need it.