He doesn't get a chance to test whether you can install apps, but he does note in his blog post that the demo unit felt unfinished. That suggests that even if he had tried to install an app it might not have worked due to this unit being a pre-production unit.
Update: I have a conflicting report from a reader who says that this ereader felt more finished than Johannes reported. Also, you can install apps. Thanks, Mike!
Johannes also confirmed that the incoV6l runs Android 2.3. That's going to make it a little hard to find apps which will run on this ereader. Of course, this device is also limited by its hardware specs, so the outdated OS might not be important.
The incoV6L has 1GHz CPU with 256MB RAM and 4GB of Flash storage. It also has a touchscreen, frontlight, Wifi, a microSD card slot, and a speaker. As you can see in the video, it has page turn buttons on either side of the Pearl HD E-ink screen.
This ereader should be able to buy ebooks directly from ebookstores, but Imco does not plan to bundle their own ebookstore on the device.