I don't particularly care much about the 3DS or the Vita but I would be more than happy if Sega were to release a new handheld that would compete with Nintendo and Sony's respective handheld. I mean, does it really have to come down to those two companies when it comes to dedicated handheld gaming nowadays? I would say the iPhone is a good substitute but it's not a dedicated handheld gaming platform so it doesn't really count when you think about it.
All in all, I wish I had more options for handheld gaming in today's gaming world.
AKA 305_King "Our greatest glory is not in never falling but in rising every time we fall." -Confucius