For those of us who with a very poor quality ADSL connection and NBN still years in the future, mobile data has seemed like a tempting alternative. Price has been the sole limiting factor -- running to $10 per gigabyte. A recent package released by Optus represents a dramatic improvement in affordability. Home users in approved areas can now sign up for a $80 per month plan that gives users 200Gb of data. If this trend continues, landlines might be a thing of the past, even for power users. And NBN will find itself up against competitors with much lower infrastructure costs.