The Qi induction charging will be available as part of the 2013 Avalon's Limited and Hybrid Limited technology package, so it will bump up the price $1,750 and also include: radar cruise control, precollision system, and automatic high beams. So, if you're really looking for it, it'll end up costing you $40K for the Avalon Limited and $42K for the Avalon Hybrid Limited.
There isn't a huge number of smartphones that include the Qi-standard induction charging, but if you have an HTC DROID DNA, LG Nexus 4, HTC Windows Phone 8X, or Nokia Lumia 920, the Avalon may interest you. Or you can just get a desktop charger for quite a bit less. It's really up to you.