It won't be a full paywall but a metered system and the Times is surveying its customers on an array of options.(survey below from Scribd). What it's looking for is the elasticity of demand and the price point when there is just the right mix of customers and revenue.
The Times is particularly examining whether existing print subscribers would pay additional fees for digital content, but it's also on record as saying its approach will be to permit a certain number of stories free each month to all before demanding fees. Some of the options include a day pass, an online subscription and an all-devices fee.
It'll be several months before the project is rolled out, but as might be expected, the industry is looking most keenly at its efforts.