What kind of computer were people uncertain about being able to create after ENIAC?

After the development of ENIAC, which was one of the earliest electronic general-purpose computers, people were uncertain about the feasibility of creating a practical computer. The term "practical computer" refers to machines that could be used effectively for real-world applications beyond experimental or academic use.

At that time, ENIAC itself was large, cumbersome, and required significant resources to operate, leading to doubts about the practicalities of smaller, more efficient systems. The concept of a practical computer encompasses reliability, usability, and affordability, which were still in question after ENIAC.

While advancements in technology have since led to the development of portable computers, supercomputers, and even explorations into quantum computing, the initial hurdle was to create a computer that could function reliably in everyday tasks, making the uncertainty around practical computers a significant milestone in the field of computer science.