Well, you probably already have a bed, no? And if you don't, there are lots of different types of mattresses out there and you may have preferences.
As for frame, if you buy the Eight Sleep Pod 4 Ultra (which is the version that comes with a base that adds head/foot elevation control), you can use the base as a bedframe if you like, though that would be pretty minimalistic.
If this product was an entire bed then it would actually be a lot less appealing because it means you have to replace your bed to use it. It's not a bed, it's a mattress cover (and optional base with the Ultra), so it's purely additive on top of your existing bed, and does not significantly alter the feel of your mattress (besides temperature).
As for frame, if you buy the Eight Sleep Pod 4 Ultra (which is the version that comes with a base that adds head/foot elevation control), you can use the base as a bedframe if you like, though that would be pretty minimalistic.
If this product was an entire bed then it would actually be a lot less appealing because it means you have to replace your bed to use it. It's not a bed, it's a mattress cover (and optional base with the Ultra), so it's purely additive on top of your existing bed, and does not significantly alter the feel of your mattress (besides temperature).