???
What is there not to get?
The PS2 was a really good improvement over the PS1 but was weaker than its main competitors, the Xbox and GC.
The next Xbox will be a really good improvement over the Xbox 360 but it seems like it may be weaker than its main competitor, the PS4.
If MS is trying to go for a "modern PS2 plan", having an attractive system to various demographics with a good price point -- therefore causing the system to have a ton of support, then I don't view that as a bad thing at all.
The reason why the PS2 held up well (as you said) was simply because of the great support it had.
It also had a complete stranglehold on the market flowing over from the PS1 dominating the N64. I don't think that the next Xbox would enjoy any greater or lesser support based on a PS2 strategy. What made the PS2 so supported wasn't specs, it was a bitch to program for.
The next Xbox won't get more support really, since all third parties will be treating both machines as having one render target.