Savyg hit on a very good point. If upgrade copies become available at a reasonable price then some folks minds may change their mind.
We all need to keep in mind also that what is being 'leaked' as to what Windows 8 will look like may not even be close to what gets released. Microsoft could even delay the release of Windows 8, atleast for desktops, if the customer base doesn't warm up to the Metro GUI.
I will keep looking at what gets leaked and try to keep an open mind, but as of now there hasn't been enough shown to cause me to want to upgrade.