To create sustainable cities for unpredicted and uncertain futures, this requires and involves broader range of disciplines. The consequences from the past generation are created our living conditions within the cityscape, while the cities have the influences in shaping the next generations' way of lives. One of the key challenges to shape our future cities are not only changing our behaviours but also redesigning and restructuring built environment to be liveable and sustainable urban forms. Based on empirical evidences from Life and Sustainability classes at Thammasat University, this paper critically evaluates sustainability concepts and models of sustainable future cities from the young generations' perspectives. Zero energy, quality of life, green infrastructure, resilience city, and combined approach were five main concepts to further explore and discuss. The method of the study is to analyse and discuss on the students perceptions and learning outcomes on sustainable concepts and models. By using built environment module as an example, the data was collected from 1,735 undergraduate students on fall semester of 2016 and 35 selected group projects were closely re-examined. The result illustrates that most of the students were familiar with two concepts on quality of life and green infrastructure. However, there were not easy to develop the cities' visionaries based on the concept of quality of life. The relationship between new generations’ perceptions on sustainability concepts and the conceptualised prototypes or models of future cities from their understandings was debated with socio-economic perspectives. To promote resilience learners with in the uncertainty changing environment, it requires creativity and imagination to support scientific literacies. Finally, this paper concludes on shaping critical minds and strong decision makers of young generations as next decade sustainability drivers visioning on future cities.