I'm not sure that the Ecwid-oriented template is something that I'll be able to use, but if you're talking about professional/business designs, then the June 2011 template Modulus is still my all-time favorite. I'd love to see a Modulus II template that continues this tradition.
Also, on a technical note, I would love to see a bullet list of the technical features that are introduced with each template. If you could only add full JQuery datatables (datatables.net) support including
editable cells
, that would make a HUGE impact on our ability to deliver better websites to customers.
And Joomla is using Mootools so..