I don't know if I really liked PS3 and XB360 that much, or what. However if I could play those games, especially from digital library, on the new consoles I would really enjoy that. I know with different chip sets, processors, etc that prevented this from being practical.
Playing games from last 10 years on new system would have been stellar.
Edit - Added comment: If MS, with Windows 10 and new DEV kits, can get Apple iOS and Android Apps to convert easily to Windows OS, and they can deploy these to phones, PCs, and XB1, why can't they make it available to developers to easily convert their 360 games? Especially Live Arcade?
Playing games from last 10 years on new system would have been stellar.
Edit - Added comment: If MS, with Windows 10 and new DEV kits, can get Apple iOS and Android Apps to convert easily to Windows OS, and they can deploy these to phones, PCs, and XB1, why can't they make it available to developers to easily convert their 360 games? Especially Live Arcade?