Advantage and disadvantages of pervasive computing?

Advantages:--

1- Selling a product or service in quicker time2- reducing transaction cost from one a/c to another

3- streamline business processes.

4- competitive pricing.

5- reducing time to order for any products. Everything can be done through mobile internet

Disadvantages:--

1. quality of connectivity
2. security concerns
3. lots of power consumption
4. Working bandwidth using here is very less