In terms of form factor, the Gekko is very similar to the earlier Akura HDMI adapter, but has several features stripped out, meaning that this is a pretty painless device to set up. As with all of the boxes and cables in this category (see our reviews of both the BBS Akura and Pound HD Link), the Gekko simply takes the VGA output signal from the Dreamcast and converts it so that it can be fed through a standard HDMI connection and into your television or monitor.
As with the aforementioned devices, there is no upscaling; the VGA 480p picture is simply passed through the internal gubbins and projected onto your screen, and if you're using a huge 4K television, the image quality will be much worse than on a 22" HD television. If you really want to get the full benefits of a device like the Gekko (or any of the others on the market), then a dedicated upscaler is what you'll need. But then, this type of device probably isn't aimed at the gamers who inhabit that end of the spectrum. If you own a Framemeister, OSSC or other similar device, then you'll likely not need something like the Gekko as your current awesome set up probably won't really benefit from the inclusion of a VGA to HDMI pass through device.
That point aside, if you are in the market for something that will allow you to connect your Dreamcast to a modern flat screen display, then the Gekko could be right up your street; and not least because it offers an interesting extra function not seen in the recently released Pound HD Link. First though, let's take a look at the physical design of the Gekko...