I'm a systems engineer by trade and deal with traditional servers to accomplish pretty much everything that an average user interacts with on a daily basis.
The idea behind EOS is a decentralized operating system where instead of a traditional server, hosting an app like banking, accounting, point of sale, file storage, etc. you could just pull up a website and do all this and have it stored on a blockchain. Pretty neat concept.
That said, EOS is still a long way off before this is possible. The technology can technically do this, but the chain isn't performing all that well, high fees to perform basic tasks, etc.
Overall, I'm impressed with EOS and for a first run at accomplishing this, I think it is great. That said, it is just a FIRST run at it, and I think there was a lot of fundamental issues with it and will not see mainstream. I do think future blockchains will take the things EOS has done right and learn from the things they didn't.
RE: Why EOS is destined to fail.