Seeing eye turtles

Well, as you might know, all turtles are "blind". My suggestion is to make a new type of turtle that can actually see!
It would be golden and have some sort of symbol or an "eye" on the front to signify it could see, and there would be new commands such as:

turtle.getItemId([forward/back/top/bottom]) --Self Explanatory
turtle.mapBlock() --Returns the nearest block id, then the direction where it is, then how far. (Not counting the ground) For ex: 5,  right, 2.
turtle.path(x, y ,z) -- Would try to get to those coordinates

Of course, if you like this, you can post commands you would like in the comments!

suggested before, turned down before

you do have detect, detectUp, detectDown, compare, compareUp and compareDown as some basic external sensing.

turtle.getItemID will never happen because in the 80's they didnt have robots that were equiped with a sience lab to determine wich elements were in a compound or sollution.
turtle.mapBlock is basicly the above with some distance, even more cheaty and just doesnt fit in.
turtle.path, you can make this yourself if you have a true/false map of the surroundings.

as said before, these things have been suggested many times and turned down even more so. its not going to happen