You are right, virtual desktop service could make sense only for entities requiring beyond home user significant computational power, preferably without the need for Internet bandwidth usage adequate for media consumption. I can imagine science and research sector to benefit from that primarily. For the home user wanting to play high-end games, such solution would be like eating a bowl of soup with two spoons held simultaneously but separately. It only makes things harder, not easier, doubling or tripling the costs. First, the cost of virtual desktop service, second, the cost of a game, third, the cost of high speed Internet connection.
EDIT:
For the hardware, it is understandable that in terms of pure cloud service usage, one ought aim to pay as little as possible for bare - but comfortable - access requirements, since superfluous native hardware capabilities are most likely going to remain dormant. Therefore, in case one hops into the cloud service usage while owning a powerful PC, it is counted as a loss.
EDIT:
For the hardware, it is understandable that in terms of pure cloud service usage, one ought aim to pay as little as possible for bare - but comfortable - access requirements, since superfluous native hardware capabilities are most likely going to remain dormant. Therefore, in case one hops into the cloud service usage while owning a powerful PC, it is counted as a loss.