According to the list, both Forza Horizon 3 and Scalebound are coming to Windows 10. Below the fold the complete list, including a list of DX12 titles.

Also in related news Microsoft released a list of DX12 compatible games:

Deus Ex: Mankind Divided

    - Quantum Break
    - Forza Motorsport 6 Apex
    - Ashes of the Singularity
    - Gears of War Ultimate Edition
    - Fable Legends
    - Just Cause 3 

And here is that complete list of MS supported titles:

Microsoft.Gunpowder
Microsoft.4Elements2
Microsoft.AWorldOfKeflings
Microsoft.Adera
Microsoft.Adera-Lite
Microsoft.AgeCastles (Age of Empires Castle)
Microsoft.AgeofEmapiresCastleSiege (Age of Empires Castle)
Microsoft.AlphaJax
Microsoft.AoECastleBeta (Age of Empires Castle)
Microsoft.ApexPG (Forza Motorsport 6: Apex)
Microsoft.ArvadaBeta
Microsoft.AtariGameOver
Microsoft.Ausar
Microsoft.BigBuckHunter
Microsoft.Bingo-Beta
Microsoft.BulldogThreshold
Microsoft.BulldogThresholdClosedBeta
Microsoft.ColdAlley
Microsoft.CrashCourse2
Microsoft.DisneyFairies
Microsoft.DisneyFairiesHiddenTreasures-Lite
Microsoft.DisneysLittleMermaid
Microsoft.EdenFalls (Trademark taken in 2014)
Microsoft.EdenFallsBeta
Microsoft.EndlessSkater
Microsoft.EveryStreetUnited (Sports Game)
Microsoft.FableLegends
Microsoft.FieldStreamFishing
Microsoft.Fishdom3SpecialEdition
Microsoft.GalacticReign
Microsoft.CollateralDamage
Microsoft.GNS-TEST-APP
Microsoft.GoCargoBeta
Microsoft.GoCargoBeta2
Microsoft.GunpowderLITE
Microsoft.HaloChannel
Microsoft.HaloSpartanAssault
Microsoft.HaloSpartanAssault2
Microsoft.HaloSpartanAssaultiOS
Microsoft.HaloSpartanStrike-Beta
Microsoft.HaloSpartanStrikeiOS
Microsoft.HaloSpartanAssaultLite
Microsoft.Hexic
Microsoft.HoganThreshold
Microsoft.HoganThresholdClosedBeta
Microsoft.HoloStudio (HoloLens HDK)
Microsoft.Ilomilo
Microsoft.KillerInstinct-Win10
Microsoft.KinectimalsUnleashed
Microsoft.Kodu
Microsoft.Lucille
Microsoft.MaxTheCurseofBrotherhood
Microsoft.Minecraft
Microsoft.MicrosoftBingo
Microsoft.MicrosoftJackpot
Microsoft.MicrosoftJigsaw
Microsoft.MicrosoftMahjong
Microsoft.MicrosoftMinesweeper
Microsoft.MicrosoftNumberPuzzle
Microsoft.MicrosoftSolitaireCollection
Microsoft.MicrosoftSolitaireCollectionPreview
Microsoft.MicrosoftSudoku
Microsoft.MicrosoftTreasureHunt
Microsoft.Microsoft.ProjectDenver
Microsoft.MinecraftUWP
Microsoft.MonstersLoveCandy
Microsoft.MSDonuts
Microsoft.NFLonWindows10
Microsoft.OpusPG (Forza Horizons 3)
Microsoft.OriandtheBlindForestDefinitiveEdition
Microsoft.ProjectCastlesBeta (Age of Empires)
Microsoft.ProjectFlair-Beta (Press Play Game)
Microsoft.ProjectFortune (Press Play Game)
Microsoft.ProjectKnoxville (Press Play Game)
Microsoft.ProjectMercury (Press Play Game)
Microsoft.Dakota
Microsoft.ProjectSparkWebsite
Microsoft.QuantumBreak
Microsoft.Studios.RecklessRacingUltimate
Microsoft.RecklessRacingUltimateLITE
Microsoft.ReCore
Microsoft.RocketRiot
Microsoft.RosewoodFP
Microsoft.RoyalEnvoyIISpecialEdition
Microsoft.Scalebound
Microsoft.SecretsTreasureTheLostCities
Microsoft.SecretsTreasureTheLostCitiesBeta
Microsoft.SesameStreetTouchandLearnTV
Microsoft.ShadowPackPC
Microsoft.ShuffleParty
Microsoft.SkullsOfTheShogun
Microsoft.Studios.HydroThunderHurricane
Microsoft.Studios.PinballFx2
Microsoft.Studios.TheWavyTubeManChronicles
Microsoft.Studios.ToySoldiersColdWar
Microsoft.Studios.Wordament
Microsoft.StudiosRMTestApp
Microsoft.Taptiles
Microsoft.TeamCrossword
Microsoft.Tentacles
Microsoft.TentaclesII
Microsoft.TentaclesEnterTheMind
Microsoft.TheGunstringer
Microsoft.TheHarvestHD
Microsoft.ThisIsOnlyATest
Microsoft.TJComboBoxingBeta
Microsoft.TYtheTasmanianTiger
Microsoft.UglyCastles
Microsoft.VisitEdenFalls (Eden Falls Demo?)
Microsoft.WordamentTapSnap
Microsoft.WSOPFullHousePro
Microsoft.XboxBriefingE32014
Microsoft.XboxFitness
Microsoft.XboxSport
Microsoft.Zombies
Microsoft.ZooTycoon3
Microsoft.ZTFBeta (Zoo Tycoon Free?)
Microsoft.zzzXLConfigTest
Microsoft.14822C0D9D6C2