Re. the OP: it can't be used in professional photography at all, it really is a shame.
I don't think that will ever change; for tethering there are no apps, Raw isn't supported, the processor is slower than a netbook's, and the (phone) OS is not likely to run any regular programs in the future, just downsized iApps .
It's a closed-system, consumer-only device ; only time will tell, but I think , even if it sells, the majority of buyers might run into usability issues very quickly.