"Historically, many business solutions vendors have taken scaled down, retrofitted versions of their large enterprise solutions to the SMB market. Lately, however, many are taking a new tack, starting with a bottoms-up approach where vendors design SMB applications to more closely resemble easy-to-use, highly functional consumer-social-oriented solutions, rather than complex, unwieldy enterprise software."
see Consumerization, Cloud Services, Mobility, Mobile Device Management, and Social Technology are Reshaping the SMB Market in 2013
Eliminating complexity and bloat is undoing a lot of the lock-in that M$ has cultivated over the years. Instead of needing a super-computer on every desk, small businesses are discovering they just need a network and any old client and OS will do the job. Step forward, */Linux, ready, willing and able to work for less.