"We will focus relentlessly on delivering delightful, seamless experiences across hardware,...

"We will focus relentlessly on delivering delightful, seamless experiences across hardware, software and services," declares the oft-criticized Steve Ballmer in his annual letter to Microsoft (NASDAQ:MSFT) shareholders. He also reiterates Microsoft's wish to "unify the cross-device user experience" between PCs, mobile devices, servers, and cloud services. Ballmer is clearly targeting Apple, but obtaining a similar level of developer support and keeping OEM partners happy won't be easy.