Regarding the question of relevance, even though many do already understand that consciousness is the root to all the experience and in that sense has primacy over allegedly "real" physical reality, it is also important to understand that we do live in a collective reality, to which we donate part of our energy to maintain the common framework of rules on the automatic unconscious level. That's why it is so hard for individual aware "players" to manifest things if they go against common rules, things like defying gravity with your will or walking through the wall. There is unconscious part of you, that has agreed a priory that this is not allowed.
But the tricky part is that the rules, that constitute physical reality, don't exist as an idea onto itself. So by studying the physical reality we're actually trying to figure out what is it, that we have agreed collectively to be true and not some fundamental underlying level of existence.
Here is a piece on the topic for those who want to learn more about the actual structure in place. I cannot prove that what is being said is absolute truth, but can only suggest it as yet another point of view and point out, that the source of information has demonstrated the level of consistency over the past 30 years, that cannot be easily written off as guessing or making things up.
"Game of Chess"
http://www.youtube.com/watch?v=X5aPEzAKw3AOne more thing. If laws of physical reality can eventually be defied, as our collective unconscious slowly begins loosening on maintaining its (physical reality's) rigid structure, there are fundamental laws of existence, that cannot be changed.
"Four Laws of Creation"
http://www.youtube.com/watch?v=fiotqFbgonM