Add to that a really slick management console, and there's a reason why they own the space.
I would question their long term (15-20 years) viability. The major part of their enterprise profit is for legacy apps, virtualizing some fox pro database backended windows 2000 box. It's a lot easier to virtualize the thing than reengineer the thing. Sooner or later though, the requirements for all systems go away, and stuff like that will get migrated to some newer system, cloud or otherwise.
The market for straight cloud systems, like s3, is a lot more even.
I have a fully-licensed copy of the latest version of VMWare Workstation for OS X and still use VirtualBox with Vagrant.
The "UX" of Vagrant fails when it doesn't work on a rather vanilla debian workstation.
Get in touch with me at mitchell.hashimoto@gmail.com and I can help you get through any issues you may be having. Not being able to set it up easily is definitely a "bug" in my book!