I am still waiting for the first DAW that integrates my mobile devices (iPhone and iPad) with my desktop and uses the same software. There are applications where a desktop is essential. It usually involves times when audio quality is critical and a treated environment is required. Those would be tracking (audio only), mixing and mastering.
I want to be able to do the rest....audio editing, mix session setup, midi recording on my mobile devices on the same DAW software so I can really integrate music making into my life and not have it by appointment only when I have time to sit in my studio. I want to do these other operations waiting in the doctor's office, on the beach, wherever.
And then I want to transfer my work files to the cloud so I can freely work on my project wherever.
We are a long way from this reality. For example, all the plugs and synths that we use on desktops have to be equally available on mobile devices. Also not sure how a tablet would behave froma speed, etc standpoint. However that problem will go away.
Anyway, I am waiting for the first DAW to offer this. If it isn't Sonar, I will still jump. The technology could be used to really integrate this hobby I love into my life.