Unfortunately this one is quite outdated! Rather stick to Zol's & Eightblack's thread as mentioned before:

Emirates Fleet Guide

As you can see 73H refers to the latest 2-class ERs sporting the brand new enhanced IFE with the tablet type control. 73J refers to the non-widescreen & refurbished ones...stop worrying! :^

Similar to 73V/73W for the 3class ones w/o crew rest and 73M/73N for the 3class ones with crew rest.

Don't put too much effort in it, there is always the last minute option of operational changes to a dreaded 73X... (All 777-300ER codes btw.) you will only know for sure once the aircraft has lifted from DXB to LGW and you track it/match the reg. of the equipment with the config tables found above.

ExpertFlyer/Gallileo: 73H:
B777-300ER, 2-class – 7 aircraft
Lie-flats in J, New Weber seats in Y, ICE digital widescreen
A6-ENA, A6-ENB, A6-ENC, A6-END, A6-ENF, A6-ENH, A6-ENI
All delivered within the past 6 month....