Infiniti already has a G25 in China and possibly other Asian markets. That G25 is powered by a 2.5L engine, which I think is a smaller variation of Nissan's VQ 6-cylinder engine as well.
To meet the stricter carbon and tailpipe emission standards of the future and lower gas consumption, the move to smaller displacement engines are inevitable ga la. Porsche, BMW, and VW are already doing that la. In fact, I'd say they are a very much welcomed move.
I wouldn't say it's a bad thing if we have the 600cc Kei cars from Japan, and those 1L engines from Europe.