Do You Think A BlackBerry PlayBook Could Effectively Replace A BlackBerry?

I reverted back to carrying multiple smartphones just about this time last year. One device has always been a BlackBerry (currently the original BlackBerry Storm). The others have been the Palm Pre Plus, the Motorola Droid, the Droid Incredible (which I am currently using), and, the BlackBerry Torch 9800, which, believe it or not, I ended up returning.The BlackBerry is great for messaging, but,