No need to be so aggressive, but to answer your question:

     1. Yes, there are probably a lot of areas that need new
        programming languages or improvements of the current  
        programming languages, everything is quite far from 
        "perfect" at the moment (and it will probably always
        be). There's still a huge amount of research going
        in this direction.
     2. Learning. Should you ever be stopped from learning
        something new by the fact that something similar 
        already exists? Probably not. This is just business 
        thinking utter bullshit.
     3. This "resource" was the starting point before few
        quite young popular programming languages. I haven't
        read it myself but it must be something good to learn
        from it judging by the outcome. Show some respect.