Hi,
Its for when you e.g. have a server control(s) with its server validation etc. - then you want to use Kendo on top of that. In the suggested way one would have to move all/some attributes from one input to another and delete the old one (slow, flickering and dirty). Or in other words: Just like most other Kendo controls works - like the current Date*Picker can use existing control(s). Can be done with a single line or two (are there two inputs in target ? use them : create em).
/Anders