As far as I'm aware off All the 737's with the Boeing Sky Interior which is G-FDZW i think to G-FDZZ and all the G-TAW* aircraft. But not to sure apart from that.
The SKY Interior is on all aircraft from G-FDZT onwards. First scimitar winglets should be seen within the next month or so. All 737 aircraft in the fleet are due to have them installed I believe, should be complete prior to Summer 2015.