This morning’s Observer column.

SOMEWHERE IN your email inbox last week you may have received from an acquaintance an invitation to a “Windows 7 Launch Party” scheduled for some time in the next 10 days. Do not be offended by this unsolicited and impertinent communication. Look at it in a positive light. The person who sent it meant no harm. He or she is offering you an opportunity to participate in an exciting new way of selling operating-system software. Its secret codename is ‘Tupperware 2.0’….