I'm happy to buy DRM'd products (as long as they're reasonable. Unreasonable DRM such as requiring I always be online is going too far). I'll also happily download un-DRM'd copies of the games should my bought copy ever stop working.
I feel this is ethical as I am supporting the company while ensuring I gain the entertainment I desire.
If games are priced reasonably (in Australia I can get Mass Effect 3 for $79 for the PC. That might seem unreasonable to Americans, but in Australia $100 and below has been the standard price for years) I'm happy to buy the original. If they're unreasonable ($120+) I'll look for used copies.
I've all but given up on consoles for 2 reasons. 1) I find it much easier to play modern games with a keyboard and mouse. This isn't the main reason though. I had initially given up on games completely before I discovered I could play them on PCs. The main reason is (2) I'm tired of the upgrade games Sony keeps playing. The PS2 was a worthy investment as it could play my PS1 games. The original PS3 was a worthy investment because it could play my PS1 and PS2 games. It's doubtful the PS4 will had backwards compatibility (based on the PS3 life-cycle) and so I'm getting off this roller-coaster while I'm still ahead.
Also making legally owned backups of games that are playable on a PS4 will be quite difficult and even possibly illegal.