I agree with sluggo that card-based will probably never be an industry norm or even relatively common - the handful that have reached market have consistently been very expensive. (I'd guess that an Outlaw unit of this type would probably have to cost $2000 to $3000 for just the core hardware if past card-based units are any indication with individual cards costing $400 to $600 each, although those numbers are just SWAGs on my part.) Plus the logistics of stocking and supporting modular units like that is not something that consumer electronics companies are used to. It's an attractive option from the standpoint of being able to only pay for the hardware you want, but a well-designed product aimed at the standard market demands will always be less expensive to develop and sell.