The fact that there are so many different players mentioned speaks to how talented this draft class could be.
A top 2 pick puts us on the fast track to being a contender
As one team picking early in the draft, I think you could argue the opposite, though - the fact that so many different names are being thrown around as superior choices gives me the impression there is considerable variability as to how these guys may pan out.
Wiggins is clearly a freak, Parker has been touted as a future star since he was like 12, and Randle is certainly athletic for his size. There are a lot of guys similarly talented and athletic, however, that have yet to win a 'chip in the league. Beyond that, consider how long it took the greats to win one (e.g., Lebron, Jordan), and the fact that they needed significant help in order to do so.
Not to mention, consider the careers of Oden, Thabeet, T-Mac (injuries), Darco, Kwame(jordan), Kandiman, etc. - maybe the hype around this draft (perhaps, deservedly so) could easily deter us from realistic expectations for the next few years (e.g., history tells us Wiggins, even if he develops into one of the top 3 players in the game, may not win a 'chip till he's 28).