Should I deploy Lync Server 2010 On Prem or wait for Lync Online?

With our upcoming Office365 cloud service, Lync Online will be a part of the offering.  I have had a few education customers ask me what the differences will be. I found this useful matrix (note: this is a Lync Online beta feature matrix and subject to change):

 

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From the Beta Lync Online Service description document here. Note: there is also a matrix for Beta Exchange 2010 Online vs. Exchange 2010 on prem comparison matrix.