I'm just a lowly old Padi Scuba Diver at this point, will be OW soon, but for what it's worth, I made my decision this way:
In my life, to date, I've been the victim of consistent Murphy's Law issues. Nothing life threatening, but I worked in IT for a long time before becoming a Cop, and I had to deal with wireless routers and the like in Networking for 5-7 years.
The reason I won't buy a hoseless computer is the same reason I won't use a wireless router. Every time I need them the most - they seem to fail. I'm not willing to take that risk underwater. The person who got me into diving has a hoseless, and there are times, even in shallow water, where he has to move his wrist close to his first stage to get the PDC to sync up again.
(No matter what anyone says - I have heard EVERY marketing scheme for every wireless device that claims "failproof" or "uninterruptable." Somone will inevitably say "I've had a hoseless for 5 years with no problems". Great - but I'm still not gonna use it!)
The reason I won't buy an AI computer is because SPG's have been around forever, the analog gauge can really only fail if it sticks, and if it sticks, it's going to be painfully obvious. If you have been down for 5 minutes and used "no" air according to the SPG, it's time to go up.
Again - I'm just an uneducated, not even fully certified diver - so my opinions aren't worth the time it took you to read this, but simply on the knowledge I have of computerized/wireless/digital equipment, I think I'll wait a while longer before I upgrade to all digital equipment.
Just to prove I'm a worry-wart - before my first OW dive - I will be equipped with a backup computer, most likely a Geo or Manta, I have really taken to them since I saw them at the shop here.