In addition to INSPECT commercialization which has been noted, I'd suggest a few other items which could be PRd to the pleasure of shareholders:
Sigma's low-cost arc-welding printer could make substantial progress.
Sigma could successfully license BAM/ARMS through their licensing partner. Personally I don't think this would be that big a deal as the royalty payments are quite small, but it would enhance their reputation and any added revenue at this time is important.
Sigma could announce product integration with a Printer OEM.
Sigma could enter into a business relationship with a non-AM company, for non-AM work related to their analytics engine.
Sigma could enter into a business relationshop with a non-aerospace AM.
And of course any new info coming out of the agreements with GE, Honeywell or unnamed AM companies. Keep in mind, Materialise came out of left-field, as did the delivery of DEFORM to Honeywell for Beta testing. There seems to be an awful lot going on right now with Sigma and I don't think anyone can predict what news will come and when.