Yoga in "pop culture" has also changed the attire of people in the West, specifically women. It is my understanding that 20-30 years ago women weren't wearing yoga tights on a daily basis in public. Yoga has also started a fashion movement where women are comfortable wearing attire that is designed for yoga practice outside of the practice room. I think that this is important to note because yoga pants are not a popular thing to wear in public in other areas around the world, this is purely a western-centric concept.
The effects of yoga on the West are widespread. In a way, I am happy for the presence of yoga in the West as I feel that in moderation, it does promote a lifestyle that is far healthier than the lifestyle that most people in the West adhere to. I believe that yoga has many health benefits and these are being revealed at a faster rate now that yoga has gained popularity in the West. I believe that long term effects of yoga will include reductions in obesity, stress, and an increase in spirituality.