Would I want to know?

I've been pondering a question all day.  On the news today they announced the development (still in the testing stage) of a relatively simple blood test that will predict if you will become afflicted with Alzheimer's within the next three years of your life.  My question is, since there doesn't seem to be a cure, would I want to know?  I can see all kinds of logical reasons why it might be good to know, I could put my affairs in order, but deep down, emotionally, I don't know.  They said it will take at least two more years before this test is ready for use so I'm hoping they can find the "cure" within the same couple of years.