Many PC users have been enjoying Windows 7 as their main Operating System; in fact most people have made the leap from Windows Vista into Windows 7 Beta or RC. That said, thought I would share a few hiccups that have encountered during the upgrade to Windows 7:
Windows 7 - 32 Bit
Windows 7 - 64 Bit
Most software has been upgraded without a problem, some were requested to be removed
The keys for Purchased software the keys had to re-entered
Webcam was recognized and fully functional
Webcam was not recognized even if installed prior to upgrade
Webcam had to be installed prior to upgrade
Seamless upgrade from Beta 7 to RC
Have not tested yet
Even though Windows 7 is still in Beta and now in RC; almost about for RTM release. These problems are relatively minimal compared to prior versions of Windows.
Thought this might come in handy for a reference if you are about to do the leap into Windows 7.