  In 2010 we celebrated 50 years since commissioning of the first particle
storage ring ADA in Frascati (Italy) that also became the first
electron-positron collider in 1964. After that date the particle colliders have
increased their intensity, luminosity and energy by several orders of
magnitude. Namely, because of the high stored beam currents and high rate of
useful physics events (luminosity) the modern electron-positron colliders are
called "factories". However, the fundamental physics has required luminosities
by 1-2 orders of magnitudes higher with respect to those presently achieved.
This task can be accomplished by designing a new generation of factories
exploiting the potential of a new collision scheme based on the Crab Waist (CW)
collision concept recently proposed and successfully tested at Frascati. In
this paper we discuss the performance and limitations of the present generation
electron-positron factories and give a brief overview of new ideas and
collision schemes proposed for further collider luminosity increase. In more
detail we describe the CW collision concept and the results of the crab waist
collision tests in DAFNE, the Italian PHi-factory. Finally, we briefly describe
most advanced projects of the next generation factories based on the CW
concept: SuperB in Italy, SuperKEKB in Japan and SuperC-Tau in Russia.
