Here are my thoughts 1. DLNA != this and many have already outlined why so no point repeating.
2. Great features and the need for software is a minor hiccup considering how feature rich the s/w makes the solution. I would consider making the software portable for windows.
3. Not all platforms have hdmi. What about display-port compatibility (adaptor?)
4. I'm less concerned about b/w like some have pointed out here. The use case is not always high quality video as long as the quality is above SD and wifi doesn't cut out.
5. I'm guessing that with a s/w option, it should be possible to do this wired on the laptop end. But, the TV end is always wireless. I would love to see a wired option to eliminate wireless as an option. Not sure if there is a wired solution that exists today to do this.
Anyway, congrats to the team. Seems like a great product.