While obviously limited in processing capabilities, it can be use for many novel things if you use your imagination. Take this video for example,
I found it very amusing and soon after bought a Raspberry Pi just so I could say I had one :]
I wonder if in the end Linux or a flavor thereof will be the standard in a few years. This is mainly being run by Android for now and as a front end of Linux it does do very well. I know some will probably think I am nuts but really it makes sense. The have laptops, slates, televisions, smart phones etc now and coming up we know there glasses concept is being sold to developers so it's development is more wide open than anything. In the end although closed to some degree it is still Linux or an adaptation thereof.