I chose (in order of importance):
1. DSP technology: With several potential improvements such as THD and IMD correction/prevention, integrated EQ, and many other possibilities, DSP's and other advanced circuitries will bring a new era of subwoofer performance. We have seen already how first wave DSP's such as the one of the Axiom EP series have made a small "wimpy looking" driver perform at amazing levels.
2. Additional finishes: Subwoofers are turning more and more into
Form + Function fixtures, and more finishes are an indispensable movement in commercial subwoofers.
3. Website improvements: I'm an E-buyer addict, and many of us are as well. The flow of customers will surely increase, and the experience be even more enjoyable when a very interactive and highly informative (specs, more pics, better layouts, link to customer pics/feedback, comparos, etc) site is used....this one is my pet peeve.
now Where is my subwoofer?!