Great idea but they have a long way to go and a very challenging road ahead to even getting into the market.
Until most of business starts using opensource (i.e. e.g. OpenOffice and the like), all of the integration counts for nothing.
Most people I know buy PCs for business and for many, the PC is the cornerstone of their computing needs.
The one time I went open source software I lived to regret it as I coudn't do my work on any other PC. My experience with OpenOffice was a real headache for me. Thats when I understood what Microsoft's dominance of enterprise software means.
Since then, anything other than Microsoft I shy from. To me, it is money wasted, especially if on a tight budget.
It is only a matter of time before the meaning of a fully integrated Microsoft software and device ecosystem starts to kick in and this means an up hill battle for alternatives like Ubuntu. I also believe Android's smartphone dominance is threatened by this and BlackBerry's comeback too (especially with BB not having a third screen, i.e. PCs). With its overly priced products and marketing magic spells Apple will always have its faithfuls - the 'elite' groups.