Sony NEX-6 & 7" Tablet

Yes, see my earlier reply.  I wouldn't recommend it for bulk editing - it's no match for LR on a PC - but you can do enough of interest to occupy yourself on a train or plane journey.

I was in PC World today and the prices of ultrabooks is plummeting - for £550 you can get a 500Gb ultrabook, amazing value. If I were buying today I'd definitely get one of those in preference to a tablet.