What I'd like to see more then anything is just a Guitar Hero/RockBand game that just takes a bunch of really technical artists. I'm like the one of the above guys in that would really just love a game full of brutally awesome tech death, but obviously that could never EVER happen for really obvious reasons.
But having just a great technical set list could really happen and would probably sell pretty well. A whole game full of Buckethead, Yngwie, Satch, Gilbert, Rusty Cooley, John 5, Randy Rhoads and Vai mixed in with some sick bands from a variety of genres (I'd love some Necrophagist, Vital Remains, Megadeth, Judas Priest and some Arsis etc etc but there's some amazing Jazz guys out there too and of course Dragonforce to feed the casual masses) would be totally amazing for me. Having to sift through 60 boring ass songs to get to the 5 songs that are even remotely challenging really grows thin with me >.<
But if I was to truly pick one band that could actually sell that I would enjoy? Well probably as sad as it is I'd have to pick Dragonforce. Simply because it is the only band that has a bunch of challenging songs that would actually sell well, even if the guitarists are god awful in real life who can't even play their own shit.
Edit: Yes Trivium are pretty bad. The guys are untalented, the music you just showed me is garbage I'm sorry to tell you. Trying to prop those guys up and compare them to the greats of metal is an absolute joke. I am honestly surprised you can type "very technical" with a straight face. I could show you literally 20 bands off the top of my head that blow these guys out of the water (and I don't even know that many metal bands!) and I am not even kidding, you ask me and I will show you (I could probably give you 50 if you gave me time to think).
Metalcore is a garbage genre, playing power chords quickly with a basic scale riff is stuff kids start making up after playing guitar for a couple of years. The Crusade (the non Metalcore album) was the most blatant Metallica rip off I have ever seen and it was quite funny to me hearing how badly they stack up to who they ripped off (and Metallica, while great for what they did for Metal were actually not that great skill wise, especially when you compare them to Megadeth)
And yes I think Parkway Drive is even worse then Trivium. Bodom is in a completely different genre then Trivium and sound completely different. The stuff they play is 1000x more complex and original then Trivium. I don't know who Sylosis is so I won't comment on them. Trivium are not well received by the Metal world and are actually mocked brutally by almost everyone in it. Seriously go to a Metal forum and say you love Trivium and see what happens ^_^ The band is really only well received by kids, and I get that, they are a good band for that genre and the people who listen to it. But they are no good compared to a huge number of metal acts out there.