Difference between 弾けるように and 弾きたい


I have a sentence example, the translation being "I want to be able to play
the piano"

ピアノが 弾けるように なりたい

Can somebody please tell me how this differs to

[code]

    ピアノを　弾きたいんです
    
[/code]

I am not understanding why ように is here. The only example that springs to mind
is one I saw on a TV segment

モップのような猫

Yes, a cat like a mop. The lady was pushing a lazy fat cat along the floor to
clean. Japanese TV eh?

Thanks in advance.




Verb in potential form+ようになる means "come to be able to do verb". It indicates
a gradual accomplishment. Your other sentence means that you want to play
piano now.

A cat mop is a brilliant idea. :)

