Idea for "scope" keyword

[Craig Black]

I thought it was very cool that .175 can instantiate an object on the stack 
using the scope keyword.  Would it be possible to take this one step further 
and be able to use this approach on class fields so that they are not 
instantiated on the heap?  I know you can use structs for this, but I find 
the limitations of D structs annoying.

class A {};

class B
{
  scope A a = new A;
}

-Craig