It looks like Apple is not moving into any kind of virtualization or emulation of Windows. Although Boot Camp is said to be included, it doesn’t appear that it will work noticably differently to current arrangments (ie. dual boot).
This is probably good news for Mac developers. I seriously believe that if you could run windows apps natively within Mac OS X without extra software then people would start buying windows software not Mac software in some cases. Look at what happened to OS2, it offered windows compatibility as standard; users asked why bother? Then they switched to Windows proper. Although OS2 also had other difficulties which may also have affected its future, supporting the applications of the main competitor probably had an effect on the number of OS2 applications released. Similarly I think Windows apps natively on Mac would affect the number of Mac apps in certain categories.