As I understand this post, not the universe is a hologram. Just the string-theory-based description of it can be interpreted as a description of a hologram. This opens the way for an alternative description of the universe as the reality whose hologram-like description is what we understand of it. Unfortunately the original articles are beyond my grasp ...

Having worked in high-tech research and development for many years, I now spend my time on advancing humanity by better education. Look at the olpc project, decide which type of knowledge you can contribute and delve into creating educational content about this. You will encounter great challenges, where more research is necessary to make good use of existing technology. The impact for people will be much higher than by inventing the next gadget or by discovering another effect.