The model numbers are easily found on the Keysight site, so looks like it is fully public now.
In addition to the datasheet already posted, there is a brand new user manual including all 4 DMMs:
http://www.keysight.com/main/redirector.jspx?action=ref&cname=EDITORIAL&ckey=2345839&lc=eng&cc=US&nfr=-536902435.1119280.00And a series of videos dedicated to the features of the 65/70 (videos amusingly dated 2015-03-03)
http://www.keysight.com/main/editorial.jspx?cc=US&lc=eng&ckey=2569771&nid=-536902435.1119280.00&id=2569771No new 60/61 firmware posted though.
There are more feature upgrades in the 65/70 and updates in the 60/61 than meet the eye. From a quick look at the new user manual:
* Datalog from front panel (65/70 only).
* Digitizing from front panel (65/70 with $400 DIG option)
* Advanced triggering (65/70 with $400 DIG option)
* Zoom/pan/cursors in datalog and digitizing modes (oscilloscope!) (65/70 only)
* Histogram cursors (65/70 only)
* More data memory (65/70 only)
* Optional 2MB memory (65/70 only with $250 MEM option)
* Aperture time instead of NPLC (65/70 only)
* ACAL. The manual does not exclude the 60/61 from ACAL even though the datasheet does (ALL - NEW for 60/61- to be confirmed).
* Extended calibration status window with ACAL-related info (ALL - NEW for 60/61 TBC)
* 1uA and 10uA ranges (65/70 only)
* Resistance offset compensation (looks like the U1272A Smart Ohms) (65/70 only)
* Resistance low power mode (lower test current to reduce self-heating) (65/70 only)
* 1GOhm range (65/70 only)
* Capacitance measurement (ALL - NEW for 60/61)
* Thermocouple temp measurements (65/70 only)
* Temperature low power setting (65/70 only)
* Smoothing filter (65/70 only)
* More math scaling: % and Mx-B (65/70 only)
* Partial 2nd measurement display (e.g. ACV while DCV primary) (NEW for 60/61)
* Full 2nd measurement display - includes pre-math and 16us peak stats (65/70 only)