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1) Microsoft is now taking security seriously, and they've made substantial changes to their key products, including purchasing products to fill in gaps in their product lineup. When Microsoft focused on security, that threw down the gauntlet to 3rd-party providers who have created a wide variety of tools which have a widely-varying ability to protect their customers. Microsoft's products generally work as described, raising the bar that other software developers must meet.
2) Wifi vendors are helping their customers to employ better Wifi security by setting WPA2 password protection right out of the box, rather than shipping devices with unlocked WEP protection. This means businesses and consumers are being more restrictive of who can get onto their Wifi network from the get-go.
3) Threats are greater now than they have ever been. Examples are the hacking of certificate authorities, financial institutions, and the Sony Playstation network. Coupled with the popularity of hacking groups like Anonymous and Lulzsec, organizations need to be more careful about security than they needed to in the past.