Xbox is testing cloud-gaming packs that let eligible Insiders buy streaming time without subscribing to Game Pass. The useful distinction is what you're buying: hours on the service, not a bundle of games.
For a console owner who only wants an occasional session away from home, that could be a more manageable purchase than starting a subscription. But don't choose a pack until you've checked that the game you want is eligible and that your account can actually use the preview.
In its cloud-playtime announcement, Xbox says the preview began on October 21 for Insiders without an active Game Pass subscription, ahead of a broader rollout in November. The US announcement lists introductory packs at $3.99 for 10 hours, $7.99 for 25 hours or $11.99 for 50 hours. Purchased playtime remains available until you use it.
Check the game separately from the playtime
The three pack sizes cover different amounts of playtime, but the larger numbers don't tell you whether the service fits your plans. A pack can sit unused without expiring; that still doesn't resolve whether your preferred game and device are supported. Those are more useful first checks than choosing a number of hours.
A couple of evenings on a trip is a different use case from making streaming your main way to play. For the occasional player, unused hours remaining available removes the pressure to fit every planned session into one month. It doesn't establish how the experience will feel on the device and connection you intend to use.
The packs promise ad-free streaming, shorter waits and high-quality streaming. Twisted Voxel's report also confirms the important restrictions: availability and features vary by market, device, account eligibility and preview ring. You need a supported device and a cloud-playable game purchase, or access to an eligible free-to-play game.
Treat those checks separately. Confirm that you can enter the preview; then check the particular game, rather than assuming that anything in your console library is included. Finally, look at the price presented to your account before paying. The announced figures are introductory prices, not a promise about what every later purchase will cost.
There's also no reason to make a bigger decision about your existing gaming setup on the strength of this announcement. This is a preview aimed at people without an active Game Pass subscription. If that doesn't describe you, wait for terms that address your situation rather than treating these packs as a confirmed replacement for what you already use.
Check your eligibility and the particular game first, then read the terms shown for your account. Keep the streaming-time purchase separate from the game purchase when deciding whether this option fits the way you play.