https://www.kickstarter.com/projects/sonation/cadenza-an-orchestra-in-an-app/widget/video.html
This is an interesting idea, although not for everyone, but I can imagine it being very useful to a lot of musicians. Good to see it has already passed it’s funding goal too.
https://www.kickstarter.com/projects/sonation/cadenza-an-orchestra-in-an-app/widget/card.html