The worst attempted musicians I have ever met were the ones who tried to figure out some way to substitute learning any instrument with a computer. It never turns out well.
For those who are interested, I was classically trained in piano, violin and voice. Used to play in professional groups for awhile. I studied music and music technology in college.
And you're right! This shouldn't be a replacement for the joy of struggling with an acoustic instrument. This just serves to put a new twist on an old idea.