Vietnam, along with China, Sri Lanka, and the Philippines, has emerged as an even lower-cost alternative to Indian IT/BPO labor.
As of now, these countries do not threaten India's position in the market, as Indian's advantage in manpower and English speakers remains much greater. However, they could serve as nearshore locations for regional companies (as Romania is for Central and Eastern European companies looking to outsource).
Wipro's numerous acquisitions have also given the company footholds in Europe (most recently, Finland and Portugal.