When I started, I had just gotten out of school orchestra after 7 years of instruction, was bored, wanted to play music and get all the chicks like my buddies in bands did, so I picked up bass. Yes, you can see exactly where the plan fell apart.
So, it wasn't too tough for me to pick up bass. I read all three clefs, was very used to four strings, albeit tuned differently, and was up-to-speed fairly quickly due to that knowledge already existing, and me only needing to concentrate on technique.
So for what it does, getting people up to speed, it's a useful tool. However, if you want to be REALLY good at anything, you have to put in the hours woodshedding. When I played violin in school, I'd practice before school, during orchestra rehearsal, and then after school. On the weekends I'd play 4-5 hours, take a break, and play for another couple of hours after supper. It drove my mom NUTS to have to listen to me play at first, but then I started to get good, and she didn't mind as much. I went from last chair second violin to first chair, first violin in the city youth orchestra that way, compared to kids who had been playing longer than I, with much better instruments and private lessons. I loved playing the music and how my violin sounded. And I still do, actually.
When I quit, it was for personal reasons, as the conductor of the high school orchestra was a real jerk, primarily due to the fact that I couldn't afford a whole lot (single mom, etc.), including a nice tuxedo and dress shoes, and private lessons from him. It got to where I hated playing, so I quit at 14.
Eventually I worked and saved enough money and bought a bass and an amp. And the whole cycle repeated itself.
The point I am (laboriously) making here is, young musicians are gonna suck. They're gonna have to come to grips with that, and realize it's OK to suck. That's SUPPOSED to happen. Its the countless hours in the woodshed that get you PAST the suck and into a state of less suck. And while Rocksmith eases that transition for the microwave generation, many of them still won't stick to it if they have unrealistic ideals such as, "I've played this for 60 days! How come I am still not headlining an arena?"
I think that, more than anything, music educators need to rethink their approach. And that goes for the guys in the music store as well as the teachers in the classrooms and the conductors in youth orchestras. Because if we're relying on video games now to develop the future music talent, we're flat out doing something wrong and if we don't fix it, the music landscape's gonna be pretty harsh.