Create a Sitecore Azure Search Provider
Sitecore comes with/supports Lucene and SOLR sitecore search providers.
Coveo have built/supports their own Sitecore search provider.
Could Microsoft build/support a Sitecore Azure Search provider?
Currently are a few open source implementations, e.g. https://github.com/jscott1277/SitecoreAzureSearchProvider
In a recent press release
"the two companies plan to expand their long-standing strategic alliance to enrich Sitecore’s Microsoft Azure cloud offerings over the next two years"
Might this be included as part of that?
An Azure Search provider is available on the SiteCore makertplace.
Sitecore have announced an Azure Search provider as part of 8.2 (update 1) - to be released Fall 2016. Source: http://files.meetup.com/14353282/Sitecore%20XM-XP%20160531a.pdf [slide 23]