Doom 4 was in development at id Software for years before the studio decided to scrap what they had and start over. This had a lot of Doom fans, my self included, worried. However it looks like it might actually turn out alright. While Doom 3 was a slower paced action horror game, Doom 4 goes back to its roots to be a fast and frenetic shooter. Personally I would have preferred more of the Doom 3 style of game, but I will admit that I am likely in the minority here. Still, what they put together looks like a pretty fun old school experience. As long as the level design is creative, the guns feel fun to shoot, and it provides a good challenge I think they will have a new game worthy of the Doom title.
The beginning of the demo they showed at E3 had me a little worried. The player speed was there, but they were only fighting a few enemies at a time. Compare that to the old games where they often threw you in a room with a dozen or more enemies at a time. It just looked too easy to me. However the second half of the demo picked up the pace considerably and got me interested again. It looked like it would actually be challenging on higher difficulty settings, and the presenter would have died in the demo if the health was allowed to go below 10.