I am still having an issue with this. The link above no longer works but I did read the section on k-rebind and have added it to the toDate field but am getting a Uncaught TypeError: Cannot read property 'getMonth' of null error when it brings up the calendar on that field.
The toDate input now looks like:
<input id="toDate" name="toDate" kendo-date-picker k-ng-model="vm.toDate" k-min="vm.fromDate" k-rebind="vm.fromDate" placeholder="To Date" />
How can I use k-min using another date pickers value?