1. Actual wifi - as a bridge to offering wifi in flight this makes a lot more sense and wifi is actually genuinely useful.
2. Integrating some live content into the feed - news, sports, etc - i will miss this about LTA and it is something that i can't actually bring from home. Audio would be fine, but video would be better - if you could at least pick up say, streaming ABC radio in it's various guises that would be useful and the bandwidth to do so may be available via current systems. Oh and birds that still have the foxtel domes should stream foxtel around the cabin.
3. Maximising the time such devices can be used - let's make it as soon after take off and as long before landing as humanly possible. A separate "electronic devices" sign or announcement would help. Maybe you can change the non smoking signs over - we get the point about that now?
4. Power points (or USB charge points). If this was the plan all along whoever ordered the new interior without powerpoints deserves some kind of demotion.
5. Fixed units in the pointy end. Having flown in the new 737 in the business cabin i can officially declare that juggling your meal and dig-e-player is a debacle so an embedded device (i guess it can probably be any kind of android tablet or a dedicated IFE device). For my own selfish reasons, i think including a seat back version for the front rows of Y would be nice too but i realise that's just because that would selfishly suit me.
6. A better mounting solution for phone, ipad, etc. on the seat back.
7. Put the audio system back in so at least there is some bloody alternative in all the obvious periods when this wont' be working or active.