There are numerous examples of space saving furniture to be found on the internet. Such furniture makes a lot of sense in cities where real estate is expensive and it is not easy to live and work in large spaces.
Often, it is seen that space saving furniture is more expensive than traditional ones. One will find reasonably priced ones too, but the difference in price is often seen to be largely a factor of ‘ease of operation’. Price is usually directly proportional to the convenience of assembling and dis-assembling such furniture. This is mainly because of the very high standards of quality and durability of the fittings used.
Even if such furniture is expensive, they still make a lot of sense, especially if you co-relate it with the cost per sq foot of real estate in an expensive location. Shown in this video are some very good examples.