Nintendo's later than expected launch of the Nintendo 3DS could cause supply constraints in the West, says industry analyst Colin Sebastian.

Speaking after Nintendo's big press conference this morning, the Lazard Capital Markets man seemed less than impressed that Nintendo's chosen to miss this Christmas with 3DS.

"Given the later launch of the 3DS in Japan, we note that shipment quantities to the U.S. next spring might be more constrained than originally anticipated," he said.

Nintendo says it expects four million 3DS units sold by the end of March, so we know they'll probably be that many on the streets worldwide around launch.

In the same period, the company predicts 15 million software units will be sold for 3DS.

That'd all come as fantastic news for Nintendo, as retailers such as GAME are reporting that sales of Nintendo consoles are down 40% year-on-year.