According to developers Travellers Tales, the game “would definitely lose something on other platforms.” The developer has not yet confirmed if plans exist to bring the LEGO City-themed titles to other platforms in the future, but if the title is successful on the Wii U then it seems natural that the developer might bring it to other consoles.
LEGO video game fans can rest easy, however, as a number of other offerings are coming for a number of different platforms in the months ahead; the biggest is the Marvel Super Heroes offering that we only recently learned is in development.