Rupert's looking at it from purely a business/financial standpoint. I suspect he anticipated quicker growth and a bigger bang for his investment buck inside a particular timeframe.
I, for one, have had D*TV for over 14 years (in 3 states), and feel its the best service bang for the buck. Add in NFL Sunday Ticket in HD, and its tough to match anywhere. Having dealt with multiple cable crapper services, as well as lousy Dish and Voom equipment and services for limited periods of time, I stand by my preference for D*TV. Add in the free equipment and install deals, and I can't see changing.
If Rupert wants to put his millions elsewhere, that's his business but has no impact on me or most anyone else.
As far as FIOS is concerned....if and when it ever appears in the other 95% of the country where it is NOT available today - they have their own fair share of issues to overcome there too before widespread acceptance.