There is no reason for it at this point.
The Vita can endure 2 gens on the market. It will probably have comparable strength to the next Nintendo portable.
This all depends on Sony. I think it would be best if they stayed in the market for 2 gens with the Vita. Well... more like 1.5 but you get what i mean. There really is no point in putting out a new system until the Vita becomes a resounding sucess at least in Japan.







