Some observers rejected the notion that the deal is Microsoft's knee-jerk reaction to Oracle's announcement last week that it would develop and support its own derivative of Red Hat Linux.
"It's a broad agreement that is going to have deep ramifications on the interoperability between Windows and Linux for a long time to come," said Al Gillen, a research vice president of systems software at IDC. "It is difficult to fully predict where this will go, but it represents perhaps the most significant shift in Microsoft's thinking we have seen in the past five years."
Hovsepian said Microsoft's agreement to solve the sticky patent issues and redistribute coupons for SUSE Linux server demonstrates the sincerity and depth of the software giant's openness and commitment to its customers. And that has far reaching implications for the software industry, he said.
"The two companies represent longstanding competition in the marketplace but also longstanding respect in the market," said Hovsepian. "We're two very solid companies ... and this announcement gives our customers interoperability and peace of mind."
At the event, representatives from customers Goldman Sachs and the city of Seattle and partner Hewlett Packard said the agreement will make it less expensive and less complex for them to develop and implement mixed solutions in heterogeneous environments.
"This is truly a breakthough and it can take interoperability to a next level [and enable] heterogeneous environments that really work together," said Shane Robison, executive vice president and chief strategy and technology officer at Hewlett Packard, who was on hand. "The next generation data center vision depends on interoperability that facilitates virtualization and automation. Without interoperability it is very difficult to fully exploit virtualization and automation. We can do it but it's difficult without interoperability."
Observers say out-of-the-box interoperability may eliminate some of the integration services needed. But it will also pave the way for ISVs, solution providers and systems integrators to develop and sell joint Windows-Linux solutions in the marketplace, most predict.
It may also ruffle feathers among community hardliners who view Microsoft and proprietary software as the problem open source is attempting to solve, analysts added. But it will have value in the market.
"The broader industry is clearly going to step back and take significant notice of this announcement. While some companies, and competitors in particular, are likely to dismiss Novell's tact and attempt to position it as a negative -- for example, that Novell is a sell-out, or as a move to give Novell a competitive advantage -- I believe that how Novell and Microsoft work together, could have deep impact on the overall interoperability story," IDC's Gillen said.
Ballmer said the pact does not signify any major shifts in the operating system or applications market. But his words on Thursday conveyed a major turning point for the world's most successful operating system company, which once dismissed Linux and open-source software as an unworthy competitor and unfriendly to business.
"We're still competitors. Let's make sure you can get a version of Linux that respects our IP," said Ballmer. "I don't think it's a big general phenomeneon going on. I like to think of Novell as a proxy for the customers."
"As CEO, I recognize Linux .... we have customers who use Linux [and other technologies] to run their business and they demand strong interoperability," Ballmer said.
Still, even Microsoft's chief legal counsel painted a broader picture of the significance.
"We had to build a patent bridge between proprietary and open source. We built that bridge and that's a histotric thing for our industry, a bridge that respects the needs of both business models and respects IP rights of people and companies," said Brad Smith, Microsoft's chief legal counsel. "Every customer who purchases a subscription for SUSE Linux Enterprise will get not only service and support from Novell but a patent covenant from Microsoft."
