they are certainly looking towards the consumer market primarily - although Exchange, SharePoint and Office Mobile apps will be apps for the business market. The 'business' market is a much smaller piece of the pie these days.
Windows Phone 7 is a great choice for mainstream business use - quality Exchange ActiveSync support (including up to 3 accounts) with a great email experience, best mobile Office tools including OneNote and SharePoint integration that rocks.
Nothing matches Windows Mobile 6.5 (and Blackberry) for Enterprise management and security, but for most business users Phone 7 is an excellent choice. Try it out!