Let's see how far Microsoft has come...
Windows 1.0
1985
Windows 8 Consumer Preview
2012

Rectangular shapes representing programs and files

Rectangular shapes representing apps (and files in another view)

Limited multi-tasking with tiled windows

Limited multi-tasking with snapped apps
This UI was scrapped in 1987 in favor of a design with unlimited multitasking through movable windows that has since become the mainstay of computing. Why is Microsoft going back to the past and returning to this rejected interface? If it wasn't good enough for 1987, why is it the future of 2012?