Good thread made me think about what it is I want in my next computer.
Am about to replace mine - works, but I want a backup for long trips. Computers die and I would rather have one I choose and dive the same one all day. In any event after owning this one for 200 dives or so I find I look at exactly four things - current depth - run time on the dive - a timer for safety stops and if I am doing multiple dives, time left at this depth in NDL. Lots of other available functions but I find I have no interest in them in the water.
Things I need - easy buttons to use in water, easy to get to back light, big numbers, only the 3 numbers I use on screen, easy to tell which number is which. Easy to tell what PO2 and O2 settings are current and a flexible safety stop (my current computer only kicks in at 15 feet and sometimes I want to stop at 20). Wrist mount so I don't have to go fishing for it when I want to see something. Strap that will not break and if it does a safety strap attached to the computer. Battery I can change.
Not interested in air integrated, as wireless just doesn't work all that well even though it would be nice to have pressure on my wrist as well. Can't get a hose to my wrist.
With depth and time you should know your pressure so having pressure always visible is nice but not essential. I don't want to have to go looking for a console to get depth or bottom time, I like it always right in front of me as I can see myself checking it less if I had to reach for it.
Anyway, just my current thinking.