Serhiy, Hynek covered the issue with the status quo in the original
proposal.The existing alternative are painful to try and decipher by
comparison with the named function:

    filterednext([0, None, False, [], (), 42])
vs
    next(filter(None, [0, None, False, [], (), 42]))

    filterednext([0, None, False, [], ()], default=42)
vs
    next(filter(None, [0, None, False, [], (), 42]), 42)

    filterednext([1, 1, 3, 4, 5], key=lambda x: x % 2 == 0)
vs
    next(filter(lambda x: x % 2 == 0, [1, 1, 3, 4, 5]))

    m = filterednext(regexp.match('abc') for regexp in [re1, re2])
vs
    m = next(filter(None, (regexp.match('abc') for regexp in [re1, re2])))

Hynek - the Python 3 filter is an iterator, so it works like the
itertools.ifilter version in Python 2.