When will an improved switch-hardware be released ?

[zorg1000]

Kristof81 said:

I wouldn't be surprised if we see Switch's first, major hardware revision before March 2019. Pretty much every previous Nintendo handheld received its first revision before year 2. 

Original	JP rel date	Revision	JP rel date	Weeks
GB pocket	21/07/1996	GB lite	14/04/1998	91
GBA	21/03/2001	GBA SP	14/02/2003	100
DS	02/12/2004	DS lite	02/03/2006	65
3DS	26/02/2011	3DS XL	28/07/2012	74
		Average		83

You do realize GB Pocket was not the original model? But overall I agree, since GBA all handhelds had a revision within 2 years.