1. Don't assume non-gamers who bought into a fad will buy your next console offering that has de-emphasised the fad they bought into.
2. Don't rely on an already popular existing tech (touchscreen tablet) as the next fad / gimmick item that increases the price of the console as the main hardware selling point of your console.
3. Don't be more on par spec -wise with lastgen Sony/MS consoles than with predicted the spec ballpark for nextgen Sony/MS. That will only work if you have a super-popular gimmick like Wiimote.
4. Your 1st party library will only sell so many consoles. You actually do need the major 3rd party franchises to be on board, and your version of those franchises needs to be up to spec with the MS/Sony versions.
5. You can't rely on primarily recycling old franchises. You need to create a whole new franchise that gets people as excited as Mario or Mario or Pokemon or Mario
“The fundamental cause of the trouble is that in the modern world the stupid are cocksure while the intelligent are full of doubt.” - Bertrand Russell
"When the power of love overcomes the love of power, the world will know peace."
Jimi Hendrix
