Are Future Nintendo consoles guaranteed moderate success?

[Otter]

siebensus4 said:

Otter said:

The handheld gaming market is not static and can also decline so Nintendo can also flop the same way PSP went from 80m to the vita's 15m, or DSs 150 to 3DSs 80m

Well, static enough to beat the 3DS lifetime sales within 4 years.

We're discussing the future. Between 90s/2000s/2010s there were drastically different sales of CDs. In 2008, someone would have said digital is taking over but the physical market is "static enough" to still represent the majority of sales, another 10 years later and physical sales are in the minority behind digital and streaming.