using modern technology on the field

[SWFLguy]

I was just musing about a few things today. I wonder why in this day and age of iPads and such that it is still illegal for a base coach to use electronic devices to keep score, track substitutes and such. If there was a reason, I forgot.
Might the day come when the home plate umpire has a little electronic gadget that downloads batting orders and is used to keep track of subs, conferences, etc. Paper and pencil seems so 1890-ish.
Any thoughts on this?