The PS4 has not been announced, is not sold, has not been seen at electronics shows at the time of this May 2010 postings. Since the PS3 was in 1080 P HD and is now updated to also play 3D it is likely the PS4 will have further technological advances.
No, you do not. It works with A/V cables like the PlayStation 2, digital like the PlayStation 2, or HDMI with HD cables.
Playstation 3 will play HD DVDs. You do not need an accessory to have the HD DVD work.
No
No, it only plays standard DVDs.
You can connect your PlayStation to a HD home theater via a component or composite cable, both of which will provide the same viewing quality.
If you got HDTV and HDMI, then yes
The Metal Gear Solid: Ultimate HD Collection is a special edition version of Metal Gear Solid: HD Collection (the latter of which is available for the PlayStation 3, Xbox 360, and PlayStation Vita). The Ultimate HD Collection is exclusively for the PlayStation 3 system and adds Metal Gear Solid 4: Guns of the Patriots, a product code to download the original Metal Gear Solid, five art cards, and a steel case, being limited to 4,000 copies. However, the Ultimate HD Collection was later cancelled and replaced by the Metal Gear Solid: HD Collection Limited Edition.
PS3 Formats (HD) AnswerThe PlayStation 3 console will NOT play HD DVD's. Sony Computer division owns the rights to HD DVD's competition, "Blue Ray". Thus, the PS3 uses Blue Ray technology. They both supply "HD" output. Blue ray has a higher capacity for storage than HD DVD.
Tony Hawk Pro Skater is a Playstation Game and the Playstation Store may have an upgraded download in HD, but the game is not sold under that title by a disc
A PlayStation 3 can Play in 480i which is not HD at all. The PS3 supports these Video resolutions 480i, 480p, 720p, 1080i, 1080p (24p/60p) according to the Specifications from the related link
You cannot play Playstation 4 games on a Playstation 4 console. You are also unable to play Playstation 3 games on the Playstation 4.
no because hd dvds are newer then the ps2 (that's like trying to play ps3 games on the ps2)