It's great that slightly less-played titles like Beyond Good and Evil and Oddworld: Strangers Wrath are getting a second chance in the market. Developers that simply slap a thin coat of paint on an old title and kick it out the door aren't to be commended, but many HD collections contain the definitive version of a game or compile a series of games into one package.
Movies are re-made and books are re-released, so why shouldn't games be updated for a new generation? It may seem like a simple way for developers to squeeze a quick buck out of an old franchise, and it does require less effort than developing an entirely original game, but it's hard to argue that revitalizing old classics is a bad thing, when done right.
As long as excellent packages like Ocarina of Time 3D, The Ico Collection, and The Metal Gear Solid Collection set the standard for re-released games, I'll spend money on my favorite games reborn.