Alias field

hello
i think it's interesting to creat an alias field
objectif :
-unserialize value a field A
-use value in field B with other option

how to use :
-create a date field A in specific format
-create an alias field B to load A in new format

now with 1 field we can display 2 different form of date without code

other exemple diplaying an image bouton
-create a bouton field A to display in category
-create an alias bouton field B to display A value in item view with other image ..
etc
i think it powerfull function for webdesigner and coder, it simply form insertion

Regards