Worldwide 1024x768 is still the most common screen resolution. Why they had chosen the width as 1024 and not a user remembrance number like 1020 or 1030?
The resolution of 1024x768 has an aspect ratio of 4:3. If the width is 1030, the height would be 772.5 pixels and since there are no half pixels, 1030 pixels is not possible.
1020 pixels would be possible, but perhaps 1024 was the maximum amount of pixels they were technically able to fit inside a screen.