I don't think that anybody really cares about BD, internal PSU (Mac Mini already has this....), USB3 will come with the upgrades, as will probably dual TB ports instead of 1xTB + 1xHDMI. FireWire will go, and potentially Ethernet too.
I have the 2011 Mac Mini, 16GB RAM (dual monitors) as a stand in machine for when I can afford something more powerful (it's way to underpowered for me), but it's a pretty good machine nevertheless.
no Ethernet means no mac.
I can't get good wifi due to my proximity to US Air Force bases and Navy Air Force Bases. When ever these are up in the air my wifi dies.
http://www.navytimes.com/news/2012/03/ap-navy-blimp-to-get-years-lease-on-life-032012w/
http://en.wikipedia.org/wiki/Northrop_Grumman_E-2_Hawkeye
http://www.gizmag.com/lemv-first-flight/22675/
these types of radar planes and blimps are tested near my home a lot. they wreak havoc with wifi.
Well I could get the t-bolt to ethernet adapt if I have to. Waiting for the 2012 mini just like the rest of us.