Yep, Celtic will win the league again. No surprise there.
However, as Celtic have found out season after season, there is a difference between playing in the puddle of the SPL, and playing with the big boys of the Champions League and Europa League.
Unless someone puts substantial resources into Rangers* (I'm not a Rangers supporter), I really don't see the situation changing. There will be the odd season when another club will win, there always is, but I can see Celtic winning most years. Whether this is good for Scottish football is another matter of course.
*Rangers is the only other club with the status to attract big money, but it isn't coming from the current owner, who had to be dragged into court and compelled to honour his legal obligation to purchase the shares he didn't already own.