Printers are not a growth market, so not very attractive to a start-up.
However, Brother is anything but new; it was started in 1908.
Making shit printers (those that are sold below cost with the profits recouped from cartridge sales and other user-hostile measures) is the only thing keeping the market afloat.
However, that segment of the market is already captured by the existing manufacturers (which have the existing patents and supply/manufacturing chain - aka economies of scale) that a newcomer would never be able to enter said market profitably.
Examples of these players would be Epson (who also make gigantic direct-to-fabric printers) and Brother (who still make sewing machines and popular label printers to print labels to stick on packages). HP and Lexmark are not leaders in the aforementioned spaces - at all.