  Precision calculations of heavy-to-light form factors are essential to
sharpen our understanding towards the strong interaction dynamics of the
heavy-quark system and to shed light on a coherent solution of flavor
anomalies. We briefly review factorization properties of heavy-to-light form
factors in the framework of QCD factorization in the heavy quark limit and
discuss the recent progress on the QCD calculation of $B \to \pi$ form factors
from the light-cone sum rules with the $B$-meson distribution amplitudes.
Demonstration of QCD factorization for the vacuum-to-$B$-meson correlation
function used in the sum-rule construction and resummation of large logarithms
in the short-distance functions entering the factorization theorem are
presented in detail. Phenomenological implications of the newly derived sum
rules for $B \to \pi$ form factors are further addressed with a particular
attention to the extraction of the CKM matrix element $|V_{ub}|$.
