If it's a "$100" item, the total will be $100 and the tax will be $23.00 of that - and it'll be shown that way on your receipt.
Overall, prices (including the tax) should stay about where they are now (your $100 item is still $100 but includes the tax) so it looks pretty good.
I've read this thread, not sure I believe the price will remain the same. Please explain how. Thanks.