Thanks Bob. I noted that. I want to have a closer look at the specs to see which model I need. I think I might need the 512 size, which looks pricey. Either that or I'll need to look at the connectivity and continue to also carry a small hard drive. I also want to know (haven't seen it mentioned) about the recharging. My ultrabook needs a small brick as well in my luggage. But yes, this looks to be the breakthrough.
I am currently travelling in Italy, with the ultrabook with LR installed plus a hard drive. It is working well for me as a system. I am also carrying three Sony cameras and trying to decide what I might standardize on/lose for future trips. With me I have an RX1 (quite possibly my favourite camera of all time), an RX100 and a 5n with Just one lens, the Sony 10-18. I am enjoying just reaching for another camera rather than lens swapping, but it is one camera too many. The 10-18 lens on the Sony 5n is brilliant but I might get very interested in the just announced RX100 mk3 which has a widerfocal length and might keep me happy instead of lugging the 5n and then stitch shots from the RX1 when I need even wider. Decisions, decisions.