The difference between The Venus Project and what we have today is the application of science and technology working towards the benefit of all mankind and the environment. It is not perfect, meaning, people will still have personal issues, but it's far better than the competitive society we live in where everyone is taking advantage of everyone else.
When humans came out of the cave, they had limited resources and tools, so they had to fight for survival. Today, we have an abundance of resources and tools, and we can use them globally, for everyone, but the competitive systems of today keep that from happening. People are greedy instead of sharing, and this has all to do with the way we all think. The way we think can be changed, we're not locked into these mindsets, we can make a decision to see things another way, but people don't want to make that decision, because the society we live in promotes and rewards greediness.
The systems we developed since we didn't have so many resources and tools are self sustaining and have locked us into this primal survival situation, fighting for resources, and keeps us from applying the concepts of cooperation, and locks us into selfishness.
Not only could that possibly change, but it needs to change, and it WILL change. There is no "it won't work", it's GOING to happen, the only issue now is how long it takes.