Could you enlighten me? as How does close up of India-US ties would open the door of russian gesture for pakistan?
Its pretty simple. US beating Russians in selling something major to India would provide a logical reason to the Russians to sell to Pakistan as well (nobody is being held back by the vestiges of cold war alignment and a major US arms sale to India would make this even clearer to the Russians).
Russian arms sales are limited to Pakistan only because there is an inclination in Moscow to see Pakistan through the Indian lenses. As Indians have pushed for de-hyphenation of US-India relations from US-Pakistan relations, the same seems very plausible for Russian-Pakistani relations. Past few years have shown that Russians are opening up but gradually towards Pakistan. India can continue to buy hardware from all sources, but that does not mean that Russia wont deal with Pakistan just because of the past Indo-Russian links.