Watch here as the Pip-Boy is booted up and if you're quick to pause, you'll notice two things; First, there's no tab for skills anymore. The stats page gives up Status, SPECIAL and Perks tabs, but no place to view skills. Second, if you go back and read the descriptions for each stat, they describe how they affect in game actions, but with no mention of skills.
The next piece of evidence comes from the crafting preview section, where at several points certain weapon mods are shown a perk requirement("Science! Rank 1", or "Gun Nut Rank 4") to craft.
Based on this, and Bethesda's (often frustrating) history of "streamlining" game mechanics, it would appear that skills have been turned into ranked perks for crafting purposes. It's likely the ranks will equate to the skill point requirements in FO3(eg rank 2=25 skill points, rank 5=100), and given the return of bobbleheads I'm guessing that you'll likely have to spend four perk slots to max a given crafting skill(five if you miss a required bobblehead).
If we assume a level cap of 30(based on previous games, and further indicated by this pic of the collectors Pip-Boy showing a character at level 24) that would mean only maxing three or four crafting skills if one wants a few other perks, or perhaps only one or two, depending on the power and/or synergy of the other perks.
And while I don't think it likely, I have to at least mention the possibility that they might split things up so the player gets to pick one "skill" perk and one "other" perk per level. It'd take some of the sting out of the change and tracks with Bethesda's penchant for making the PC too powerfull too quickly. Even if it still leaves high-intelligence builds in an eight hour marathon of Ow! My Balls!
Honestly, this is one of the few things I've seen about FO4 that's actually straight up disappointing. The only real upside to this is that we're still dealing with Bethesda. It's very likely that skill points are buried somewhere in the code, and even if it takes F4SE and extensive UI mods I'm sure they'll be modded back in.