Protect everything? Is that a better DLP?

I was reading an interesting post about DLP at Securosis. Rich has deep expertise and an excellent way of explaining what the area is all about...

However, the post got me thinking - how do we reliably understand content in order to differentiate and protect what's important? Do we have easy to manage policies yet? Can the policies adapt easily based on chaning business? Is the technology ready?

I do see traditional DLP solutions being very complementary to data encryption products - one identifies it, finds it and the other can protect it. Nice and easy.

However, I am thinking that maybe an interim step might also be needed before we can get to nirvana of understanding content, proactive policies etc. What if we are able to protect all data (or even data that are on these file shares, laptops etc ) regardless of what is in them - and keep them persistently protected at rest and in motion? Think of it as the blunt approach - similar to using FDE to protect all the contents within a hard drive regardless of the sensitivity of an individual file within.

From a customer perspective, they don't want anyone without the right authorization to see any data - that's all. This can be achieved by persistent, data-centric or information-centric protection without any differentiation based on understanding the content.

Could/should DLP be redefined, thus?