This paper shortly reviews the main features of new concepts for power production by Catalytic Combustion (CC). In particular, the main issue of fuel-rich combustion, that has been recently proposed as a preliminary conversion stage for gas turbine (GT) burners, is herein critically examined in terms of active phases, physical and geometrical features of substrates and sulphur resistance. Moreover, in the last few decades, a huge interest towards Integrated Gasification Combined Cycle (IGCC) plants, in which several liquid or solid fuels are converted into “synthesis gas”, has increased the attention towards the study of the lean combustion of fuel mixtures containing H₂ and/or CO at conditions relevant for GT power systems. The main results of high pressure catalytic combustion of syngas have been reported. Another recent research subject is the application of CC in the micro-power generation, which was attractive as an alternative to batteries for small and/or portable devices. As a matter of fact, in this context, the use of catalytic combustion appears the better and only viable choice since the micro-scale combustion is characterized by an elevated surface-to-volume ratio involving problems for homogeneous combustion and thus favouring the catalytic one. The most important topics influencing the stability map of micro-combustors such as construction solutions, materials choice and a more reactive fuel addition (i.e. H₂) are briefly critically presented in this short review. Moreover, new concepts such as hybrid micro-combustors are herein presented as an interesting route to enlarge the operating window.