I'm one of the founders of Visionect and we've been providing tools for EPD development for a while now. The pricing towards E Inks development kit reflects the tooling that is included in our development kits - you're able to plug one 32" panel to ethernet, configure the IP and display an image in minutes. Dynamic applications are simple web pages, so that gets our developers off the ground very fast - for instance: integration with Geckoboard literally means entering one URL in the server configuration.

PS: If I were looking to deploy a wall mounted panel which doesn't look like a development kit, I would wait for a while. ;)