Siliconfile Looks for a New Direction?

Recently it came to my attention that Siliconfile has submitted a slew of patent applications on 3-D stacked image sensors, Si-Ge-based sensors and sensors with protruding photodiodes. These new ideas are quite a departure from its current offerings.
It looks like the company is in search for a new product or market. Indeed, it's hard to compete in the mainstream these days. Even though Siliconfile has quite a strong portfolio now, it might find it difficult to remain competitive in the pixel size race.