Yes, pre-owned is necessary. Currently. however it is just an solution to certain problems within the industry, that games are expensive and people are cautious about moving outside of their comfort zone. Until the games industry can find a way to allow people to play more games without resorting to 2nd hand, then that market needs to stay. The 2nd hand market is every bit as responsible for making gaming a mainstream media as anything else, without it, people would buy and play less 'real games' meaning the 'real game' market would be squashed by mobile games. As a gamer, I thrive on having a regular variety of games to play, I don't ever want to be faced with a time where I have to wait months for the next game I want to turn up, which is what we would be faced with without the 2nd hand market.
The simple facts are with easier access to a greater variety of games and a cheaper price, people play more and in the future they will buy more, the main game sales grow thanks to the distribution granted by the pre-owned market.
However, I am also fully aware that 2nd hand sales DO carve into new game sales, but the amount is questionable. There is certainly a number of gamers who will wait for 2nd hand games, many of them openly admit to it, but on the flip side a lot of these games sales are for games that people would never have played otherwise, and, indeed, can lead to MORE primary sales in the future. I honestly don't see that blocking 2nd hand games will have any benefit to primary game sales, the people who will buy these games new will do so anyway, either on release or when the games are reduced. THAT I believe is key, that 2nd hand sales take away from games on deals and reduced prices. What's the answer? Well I don't see that reducing the cost of new games will make a difference, people who wait for the price drops wait for a reason, for a particular price, that 2nd hand will get too faster the new. Of course they could reduce game prices from the off, but then they're just reducing their own income with no benefit, so that won't happen. The only answer I can see is what HMV suggested, giving publishers a cut of the preowned income.
I also have to point out the supposed issue with yearly releases not being particularly different being an issue. I can see the argument, but what people forget is that a LOT of gamers are happy to just get an upgraded CoD for another year. Also important to note is that the annual releases are somewhat necessary, they are the cashcow, the regular guarenteed income that publishers need to allow them to expand into new games and IP's. Ubisoft, with their 465,923 Assassin's Creeds game have been able to produce another fantastic Far Cry game and work on Watchdogs, thanks in no small part to the regular income they can guarantee from an annual/biannual release of AC.
Anyway, tl;dr, Yes we need pre-owned until the games industry figures a way to widen distribution of their games without it, as without that wider distribution people will play less and buy less in the future. However, the games industry still needs to protect its profit margin (yes it does, it's a business, deal with it) so by all means continue with online passes etc and in the mean time try and find a way to either replace 2nd hand without harming the consumer, or work a deal to take a piece of the profit.
One. Warrior. Nation.