I'll start...
1. I'm sure there was a valid economic or technical reason for your choice of screen size, but a bigger screen would be nice. I assume the device can function as a picture frame and/or has a PIR sensor to wake up the screen.
2. I understand this device has RF antennas so placement and orientation is important, but is it possible to recess mount the device in a wall without adversely affecting the performance or cooling of the device? HAers love the flush mounted built in look vs something jutting out from the wall.
2a. Have you considered a more basic model which functions simple as a bridge repeater which I could install for example in a wall on another floor or room. Or for example that connects to a customers already existing WLAN to function simply as a HA touch screen?
3. Will their be a recurring fee for use of the device or just a one time fee? Does it use the cloud for access?
4. I think the easy to use GUI is a great idea for the average consumer, but DIYers like access to advanced features to tweak their router to provide better performance, multiple VLAN, SSIDs, VPN, PPoP settings for DSL, change the subnet, reserve static IP addresses, DyDNS, bridged repeater, etc. Will there be a web interface to allow access to more advanced features like DD-WRT open firmware?
5. Can the device function as a video intercom?
6. What about music/video streaming? For example streaming from iTunes or a SiliconDust steaming TV tuner or using Airplay.
7. Speech control?
8. HA is made up of a wide range or products, protocols, solutions. How do to plan to support or allow developers to add support for the mix of HA and interests? Does the devise allow DIYers to all their own applications? DIYers love the open source model and like to share their ideas and solutions.
Maybe it can't do all these things yet, but these are a few things that a HA DIYer like myself are looking for on this forum.