Image quality depends on many factors, but one important factor is the size of the image sensor. Larger sensors are able to collect more light and thus have a higher signal-to-noise ratio.
|image from Wikipedia|
There are three variants of the Entaniya 250 for MFT. The 3.0mm variant can fit a 250-degree circular fisheye image within the MFT sensor, thus making it possible to capture hemispherical 360 photos and videos.
|diagram by Entaniya|
A larger sensor brings many advantages such as higher bit depth, higher dynamic range, and less noise. It will provide image quality much closer to what people are accustomed to expecting from a DSLR or an interchangeable-lens camera. Here is a sample image from the 3.6mm variant.
The Entaniya 250 will be available by the end of 2016 for ¥388,000 JPY (approximately $3,735).
Thank you very much to Mike Cane for bringing this to my attention!