I play 3.5 myself with a group and we had a look at 4.0.
Most of us felt that 3.5 is roleplay with combat and 4.0 is combat with roleplay.
4.0 is definately all about combat, IMO. Feels like an MMORPG, where a name is often as deep as you'll go as far as RP is concerned.
Due to the fact that we mostly played while I was rather young, and due to the people I play with, we never did have really RP-heavy games, regardless of the edition. So I guess for us both of them were combat with roleplay.
