Ya guys missed the point that I was making. Even with high hp, you can still threaten PCs in certain situations with the current rules, through a little bending. It's still supported, however.
I am most DEFINETLY NOT saying that high lv PCs should feel threatened by a single peon; that is a gross exaggeration. I *am* saying, however, that the PCs can in fact be threatened under the right circumstances despite high HP whereas they couldn't before in earlier editions, without some heavy rule0ing, or a ton of magical bullmess thrown in. In addition to that there are ways to threaten the PCs in such situations in campaigns of varying magical power.
For example, if a NPC assassin had a knife to one of the PC's throats and the villain was sneering, ready to make them surrender or negociate, while the rest of the party just laughed at him and said "haha, how will your goon kill him before he breaks free and we paste all of you, with him using a d4 dagger" in your campaigns, that is a little odd. If you need things going exactly by the rules to threaten your PCs (meaning to capture the PCs in a castle setting at higher lvs, you would have to have mages, monsters summoned and such instead of 60 crossbowmen, unless all of their xbows and bolts were enchanted and poisoned...), then they will likely not be doing much roleplaying or city/castle dwelling, and that is fine. Or, it is just a high magic campaign rather than a mid/low one, and that is fine. Just remember, NOT all campaigns are high magic, not all campaigns have to have fantastic demons to convince the PCs they need to listen to the opposition for once or stop fighting for a moment to realize they probably should reconsider their options before continuing.
The great thing about D&D is that you can run the pace how you want. I was simply saying that certain realistic situations can retain their realism despite unrealistic levels of hp. With CDGs, there are fewer cases of, "oh, I had to slit his throat 8 times before he died...was quite messy", or "the executioner for some reason couldn't cut off the villains head until he had hacked at the screaming criminal's neck 26 times, and then the evil criminal finally died, his head rolling to the ground, and the onlookers just staring in shocked silence", or "the rebel was finally cowed and gave up after 60 archers and the royal guard cornered him and shot 10 volleys of arrows into him, 156 of which actually hit and didn't glance off, and 63 of which actually pierced through his armor...afterwards he was escorted off to prison, where the arrows and his armor were promptly removed, and it was all actually a misunderstanding and the guy was let off within a week", though the cases might really happen in more fantastic (or silly from my exaggerations
) campaigns. It's up to the DM, and the tools are there.