What problem does this feature solve?
Subject pretty much sums it all up. More often than not a property name matches a variable name. Typing :value="value" :options="options" looks a bit excessive.
Feature is strictly cosmetics but it would help us to write less and more expressive code.
What does the proposed API look like?
<component :prop1 :prop2 /> would automatically pass prop1 and prop2 to the component. If prop1/prop2 is not defined undefined would be passed instead. Additionally a warning would be printed to the console.