Last year I bought a Line 6 Pod HD500. I was playing in a band 30 miles away and sick of hauling a Marshall stack every week. It worked well but I couldn't get past the fact that I was playing a digital simulator. I also felt trapped in the presets as I had to sync it to a desktop to make any real changes.
That Christmas Renee got me Amplitube for IPad. It was a good practice tool but again limiting. I also lost the adapter somewhere in NY and never used the app again.
Digitech has taken this idea a step further and integrated the iPad right into a pedalboard.
This concept, while cool, doesn't seem to have a huge benefit. The board is still huge and needs an adapter to run but now it contains an expensive iPad. At a gig I'd rather have the iPad on a music stand to look up lyrics or, better yet, at home where it can't get damaged or swiped. If the it was much smaller and lighter and could be powered by the iPad's internal battery you'd really have something. As it is, it looks like Digitech made this board not because of any need for guitarists, but because they could.