I use a wrist computer (Cochran Commander) and find that I like it better on my right arm so I can continue to watch it as I dump my BC with the left hand overhead.
Usually, when I decide to come up I pretty much know how much air I have in my tank (that's what usually tells me it's time to head up). So watching my tank pressure isn't much of an issue for me by this point in the dive. An AI computer might be handy, but I just like the simplicity of the SPG.
My console has a depth gauge, my computer reads a depth, and my wrist watch also has a depth gauge - so I have that base covered.
As the others have said, I find it easier and quicker to spot check my wrist computer than having to reach down for my console on the retractor. But that's just me (and some others).
If you like what you have, then you have done right.