Ahead of Microsoft’s E3 briefing next week, Xbox boss Phil Spencer has spoken out to assure fans that–even though some exciting Xbox games have been delayed–2015 will still be an “exceptional” year for gamers thanks to the combined efforts of Xbox One and PC with Windows 10.

“This has been a great year for gaming at Microsoft, and it’s only going to get better in the coming weeks and months,” Spencer said in a post on the Xbox Wire. “With the greatest games lineup in Xbox history coming to Xbox One this year, and Windows 10 being the best operating system for gaming we’ve ever released, this is going to be an exceptional year for gamers.”

“No matter where or how you play, I truly believe 2015 will be our biggest year yet.”

Some of Microsoft’s big exclusives for 2015 include Halo 5: Guardians, Forza Motorsport 6, Fable Legends, Rise of the Tomb Raider, and possibly a Gears of War remaster. Microsoft previously teased that it will also announce new IP at E3, and of course, more games are likely to be revealed.

As for Windows 10, the new operating system–which has a new Xbox app and game streaming support–launches on July 29. The operating system’s integration into Xbox One, however, is coming later.

Microsoft’s E3 briefing is slated for Monday, June 15, starting at 9:30 AM PDT. We’ve already told you what we want to see from Microsoft at E3, but what about you? Let us know in the comments below.