The new concept glass toaster, which lets you see your bread as it browns, is from product developer Inventables.  The idea is based on transparent heating glass technology and the idea is that the glass heats up enough to toast the bread.

It means people can keep their eye on their breakfast and eject the slice at the moment it turns the perfect colour. This would eradicate the need to put the bread back down and run the risk of having to scrape burnt toast.

However, a traditional timer dial is still incorporated into the design, for people who are too busy to keep an eye on their bread. A downside to the current design is that it only fits one piece of bread at a time.

I don't see that as a problem... make a slice and eat it while watching the next one cook.  Repeat until sick.