At a news conference, executives demonstrated a new touch-first version of Office crafted for the iPad, available for download as a free app, though a subscription is needed to let users create or edit documents rather than just read them.
Significantly, they did not demonstrate any software on Windows machines, telegraphing a departure from former CEO Steve Ballmers focus on the personal computer operating software and its own devices.
Their absence speaks volumes, said Daniel Ives, an analyst at FBR Capital Markets. Nadellas a cloud-centric guy; hes going to focus on whats been successful, and where the futures going. Windows 8 thus far has been extremely underwhelming.
Nadella kicked off the presentation with a fluid, low-key introduction to Microsofts approach to the new mobile, cloud-centric world of computing, in his first public appearance since taking the helm 52 days ago.
Dressed in a black polo shirt and dark jeans, the 46-year-old computer scientist threw in some geek humour and lines of poetry from TS Eliot, marking a change in style from his energetic predecessor Ballmer. His lack of references to Windows indicated a deeper strategic shift.
Nadella gave no indication of when Microsoft would release touch-first versions of Office apps for Windows 8, the latest version of the operating software, which he acknowledged had fallen behind in the mobile era.
To create new documents, users will need a subscription to Microsofts existing cloud-based service called Office 365. Microsofts Office 365 Home Premium, designed for home consumers, costs $100 a year. For businesses it costs $60 or more per year, depending on features. Analysts have estimated that Microsoft could rake in anywhere from $840 million to $6.7 billion a year in revenue from iPad-native Office, although some fear it may have moved too late to grab the attention of many.