I don't get the idea at all but maybe in a few years...
I DO have all my 30K Raws (DNG's) up on the cloud as a backup to CrashPlan. Took like two weeks to upload the initial group. OK, with Smart Previews, that's less data and will take only a week.
So the idea is, I am going to somehow download a card I shot from my 5DMII into an iPad? Are you kidding? So short of that, I have to use my Mac and LR and ingest which we all knows takes time. I'm OK with that. Now the idea is, I'm going to run into the living room with my iPad to edit, sort, etc? I'm just fine doing this on my Mac with a big, calibrated display using fast processors and OS. I'm going to move into Develop on training wheel's on an iPad that isn't color managed? I think not.
I simply don't understand how to separate what appears to be 90% marketing hype from something that may be useful in a few years when tablets are as fast and efficient as last year's MacBook Pro.
I can put Raw's on the cloud today (my cloud, DropBox, CrashPlan). Now what? Other than a good offsite backup, why?