To me a tablet version seems much more sensible than a console version, but even then I'd be cautious and not really consider it until late in production depending on a feasibility estimate. The problem with consoles is not just the (very) limited hardware, but also considerable first party requirements on any product. Load times have to be below certain times, save games have to be handled certain ways, you might be forced to add leader boards or other 'features' to your game for which it just isn't well suited. Coming up with solutions to not just the hardware limitations but also 'certification' requirements can end up soaking up significant number of development time and degrade other platforms.
On consoles we have to do X, but we'd rather do Y on PC, it is more time consuming to do X rather than Y, but it is even more time consuming to do X and Y. So we either don't release on Consoles, chose the X for Consoles and PC's degrading the PC slightly by implementing a not optimal solution, or develop and implement two independent solutions, degrading both platforms heavily due to the massive development cost of maintaining two different solutions.