treenutz68 Whether you upgrade or not is purely a personal cost-based decision.
The longer you wait between releases - the more money you save... I went from the P6P to the P9P but if my P6P's display wasn't seriously cracked I'd have waited for the P10x.
Also the longer you wait the better the improvement to your experience is... even from the 6P to the 9P - once I'm using the device - it is clear the 9P is a bit nicer in general - but honestly for 90% of what I do - I can't really tell much difference...