>>You're looking at it from the point of view of the customer, not the seller.

Mustn't get into that sort of habit- what benefits the seller is what matters. ;-)

>>As for what WIn8 brings? Better memory management. Faster OS. Faster boot/wake up. Better security (http://www.howtogeek.com/128182/6-ways-windows-8-is-more-secure-than-windows-7/, http://securitywatch.pcmag.com/none/300781-windows-8-much-more-secure-than-windows-7).

Many customers hear "la-la-la-la-la-la-la-la-la." They already have firewalls and hardened working XP setups. Some are moving to hardened Windows 7 environments because of driver breakage. Besides, if security really were the prime concern they'd all be using Linux Mint or something like that.

>>Additionally, comparing to WinXP, IE 10 supports HTML 5 and CSS3.

If MS decides not to alow HTML5 and CSS3 on XP, customers either will choose a different browser or will say they don't care. But upgrading to Win8? To many that would feel like putting your head back into a noose held invitingly open by a vendor who wants you to commit to a new product because it broke the old one on purpose.